Electron was discovered by
A.J.J. Thompson
The isotopes of an element differ in the number of
Neutrons
Atoms or ions which have the same electronic configuration
Isoelectronic
Which group in the periodic table is known as the alkali metals.
Group 1
Which group in the periodic table is known as the halogens.
Group 7
Which group in the periodic table is known as the alkaline earth metals.
Group 2
Which group in the periodic table is known as the noble gases.
Group 8
The components resulting from a reaction is called
Products
What kind of chemical bond will form in a binary compound where the elctronegativity difference between atoms is less than 1.5
Covalent bond
Compounds which only contain carbon and hydrogen are called
Hydrocarbon
Which of the following designation means that the amount of solute is expressed in physical mass units, i.e. grams and the amount of solution is expressed in volume units, i.e. milliliters
w/v
What kind of chemical bond will form in a binary compound where the elctronegativity difference between atoms is greater than 2.0
Ionic bond
The isotope of hydrogen
Protium, Tritium, Deuterium
The isotope of hydrogen with only one neutron
Tritium
The atoms having different atomic number but the same mass number are called
Isobars
What kind of chemical bond will form in binary compounds where the electronegativity difference between atoms is less than 1.5?
Covalent bond
The element which has a mass of about 9 amu is beryllium (Be), atomic number 4. What is the charge on the Be atom?
Neutral
The mass of an alpha particle is how many times more than that of an electron
7300
Atoms with the same number of protons but different number of neutrons are called
Isotopes
The forces that hold atoms together are called
Chemical bond
An atom or group of atoms that has a net positive or negative charge is called
Ion
A positive ion is called
Cation
A negative ion is called
Anion
The force of attraction between oppositely charged ions is called
Ionic bonding
The horizontal arrangement of elements of increasing atomic number in a periodic table is called
Period
The vertical arrangement of elements of in a periodic table is called
Group
If the number of gas molecule is doubled in a certain volume of gas, the pressure
Is doubled
A symbolic representation to emphasize the valence shell of an atom is called
Electron dot diagram
For which elements does the number of electrons in their outer or valence shelll correspond to their group number
Representative or main group
What is the maximum number of electrons that can fit in a “p” orbital
5
The property of liquid which describes their resistance to flow is called
Viscosity
The anions and cations which are unaffected by the reaction in solution are called
Spectator ions
A reaction in which heat is produced is called
Exothermic
The atoms having different mass number but the same number of neutrons are called
Isotones
Rutherford model of an atom failed to explain
The position of proton and neutrons
The concept that electrons revolve around the nucleus in specific paths called orbits or energy levels was proposed by
Niels Bohr
The number of atoms present in 6.023 x 10^23 12 grams of carbon-12 is called
Avogadro’s constant
An instrument that separates particles of different isotopic composition and measure their individual relative masses.
Mass spectrometer
These are compounds containing water molecules loosely bound to the other components.
Hydrates
If a more active element replaces a less active one in a compound, the reaction is:
Replacement reactions
If a single reactant is transformed by heat or electricity into two or more products, the type of reaction is:
Decomposition
The numerical value for standard pressure of any gas is:
760 mm Hg
Any process of extracting the metal in a fused state is called
Smelting
Which of the following does not change with change in temperature?
Mass
A device used to measure density.
Hydrometer
The statement “mass is neither created nor destroyed in a chemical reaction” is known as:
The law of conservation of mass
What kind of chemical bond will form in binary compounds where the electronegativity difference between atoms is greater than 2.0
Ionic bond
A reaction in which heat is absorbed is called
Endothermic
In redox reaction, the component supplying the electrons is called the
Reductant
In redox reaction, the component receiving the electrons is called the
Oxidant
A covalent bond formed by the combination of collinear p orbitals is also called a
Sigma bond
The central part of an atom is called
Nucleus
The mass of a proton is about how many times that of an electron
1837
The particles in the nucleus, namely the neutrons and the protons are collectively referred to as
Nucleons
The number of orbiting electron is normally _____ the number of the protons in the nucleus of an atom
Equal
The chemical formula which shows the relative number of atoms of all the elements present in a compound is called the
Empirical formula
The chemical formula which shows the exact number of atoms of all the elements present in a compound is called the
Molecular formula
When an atom loses an electron it forms
Cation
When an atom gains an electron it forms
Anion
The maximum number of electrons that the first energy level can accommodate is
2
The X-rays are discovered by
W.C. Roentgen
Refers to atoms or ions, which have the same electronic configuration.
Isoelectronic
Which group of the periodic table is known as the akali metals?
Group I
Which group is known as the halogens?
Group VII
The horizontal arrangement of elements increasing atomic number in a periodic table is called:
Period
The number of protons in the nucleus of an atom is called
Atomic number
The measure of the resistance of an object to a change in its state of motion is called
Inertia
Refers to agreement of a particular value with the true value
Precision
Refers to the degree of agreement among several measurements of the same quantity
Accuracy
A property of matter often used by chemist as an “identification number” for a substance
Density
Protons and neutrons can be broken down further into elementary particles called
Quarks
The principle of constant composition of compound, originally called “Proust’s Law” is now known as
Law of definite proportion
The mass that enters into a chemical reaction remains the unchanged as a result of the reaction. In precise form: mass is neither created nor destroyed. This is known as:
The law of conservation of mass
When the same elements can form two different compounds, the ratio of masses of one of the elements in the two compounds is a small whole number relative to a given mass of the other elements. This is known as:
The law of multiple proportion
The ratio of the density of the test liquid to the density of the reference liquid is called
Specific gravity
How many electrons are there in a covalent bond?
2
SI unit of temperature
Kelvin
The elements that a compound is composed of is present in fixed and precise proportion by mass. This is known as
Law of constant composition
The mass to the nearest atomic-mass unit of an atom which contains 9 protons and 10 neutrons
19 amu
The net electric charge of any atom is
0
The tendency of atoms to attract electrons into their valence shells to form anions is described by the concept of
Electron affinity
The tendency of atoms to attract electrons shared in a covalent bond is called
Electronegativity
A covalent bond between atoms of identical electronegativity is called
Nonpolar
A formula which describes only the number of each element in the molecule is called the
Molecular formula
The formula which shows how atoms are joined together is called the
Structural formula
The pairs of electrons not shared in the covalent bond are called
Nonbonded electrons or lone pair
The word atom comes from the Greek word ”atomos” meaning
Cannot be cut
Under normal state an atom is said to be
Electrically neutral
The word electron comes from the Greek word ”elektron” meaning
Amber
The word proton comes from the Greek word ”proteios” meaning
Of first importance
A solid which has no crystalline structure is called
Amorphous
A chemical substance which readily evaporates and readily diffuses at ordinary room temperature and pressure conditions is called
Volatile
Which of the following falls under fluids
Both liquid and gas
The gases that rarely take part in a chemical reaction are called
Noble gases
Which type of ions, metals form when enter into a chemical reaction
Positive ions
The chemical name for baking soda
Sodium bicarbonate
The subatomic particle with a negative charge and mass of 9.1 x 10^ -31 kg is
Electron
The subatomic particle with a positive charge of mass 1.6 x 10 -27 kg is
Proton
Neutron was discovered by
Chadwick
A.J.J. Thompson
The isotopes of an element differ in the number of
Neutrons
Atoms or ions which have the same electronic configuration
Isoelectronic
Which group in the periodic table is known as the alkali metals.
Group 1
Which group in the periodic table is known as the halogens.
Group 7
Which group in the periodic table is known as the alkaline earth metals.
Group 2
Which group in the periodic table is known as the noble gases.
Group 8
The components resulting from a reaction is called
Products
What kind of chemical bond will form in a binary compound where the elctronegativity difference between atoms is less than 1.5
Covalent bond
Compounds which only contain carbon and hydrogen are called
Hydrocarbon
Which of the following designation means that the amount of solute is expressed in physical mass units, i.e. grams and the amount of solution is expressed in volume units, i.e. milliliters
w/v
What kind of chemical bond will form in a binary compound where the elctronegativity difference between atoms is greater than 2.0
Ionic bond
The isotope of hydrogen
Protium, Tritium, Deuterium
The isotope of hydrogen with only one neutron
Tritium
The atoms having different atomic number but the same mass number are called
Isobars
What kind of chemical bond will form in binary compounds where the electronegativity difference between atoms is less than 1.5?
Covalent bond
The element which has a mass of about 9 amu is beryllium (Be), atomic number 4. What is the charge on the Be atom?
Neutral
The mass of an alpha particle is how many times more than that of an electron
7300
Atoms with the same number of protons but different number of neutrons are called
Isotopes
The forces that hold atoms together are called
Chemical bond
An atom or group of atoms that has a net positive or negative charge is called
Ion
A positive ion is called
Cation
A negative ion is called
Anion
The force of attraction between oppositely charged ions is called
Ionic bonding
The horizontal arrangement of elements of increasing atomic number in a periodic table is called
Period
The vertical arrangement of elements of in a periodic table is called
Group
If the number of gas molecule is doubled in a certain volume of gas, the pressure
Is doubled
A symbolic representation to emphasize the valence shell of an atom is called
Electron dot diagram
For which elements does the number of electrons in their outer or valence shelll correspond to their group number
Representative or main group
What is the maximum number of electrons that can fit in a “p” orbital
5
The property of liquid which describes their resistance to flow is called
Viscosity
The anions and cations which are unaffected by the reaction in solution are called
Spectator ions
A reaction in which heat is produced is called
Exothermic
The atoms having different mass number but the same number of neutrons are called
Isotones
Rutherford model of an atom failed to explain
The position of proton and neutrons
The concept that electrons revolve around the nucleus in specific paths called orbits or energy levels was proposed by
Niels Bohr
The number of atoms present in 6.023 x 10^23 12 grams of carbon-12 is called
Avogadro’s constant
An instrument that separates particles of different isotopic composition and measure their individual relative masses.
Mass spectrometer
These are compounds containing water molecules loosely bound to the other components.
Hydrates
If a more active element replaces a less active one in a compound, the reaction is:
Replacement reactions
If a single reactant is transformed by heat or electricity into two or more products, the type of reaction is:
Decomposition
The numerical value for standard pressure of any gas is:
760 mm Hg
Any process of extracting the metal in a fused state is called
Smelting
Which of the following does not change with change in temperature?
Mass
A device used to measure density.
Hydrometer
The statement “mass is neither created nor destroyed in a chemical reaction” is known as:
The law of conservation of mass
What kind of chemical bond will form in binary compounds where the electronegativity difference between atoms is greater than 2.0
Ionic bond
A reaction in which heat is absorbed is called
Endothermic
In redox reaction, the component supplying the electrons is called the
Reductant
In redox reaction, the component receiving the electrons is called the
Oxidant
A covalent bond formed by the combination of collinear p orbitals is also called a
Sigma bond
The central part of an atom is called
Nucleus
The mass of a proton is about how many times that of an electron
1837
The particles in the nucleus, namely the neutrons and the protons are collectively referred to as
Nucleons
The number of orbiting electron is normally _____ the number of the protons in the nucleus of an atom
Equal
The chemical formula which shows the relative number of atoms of all the elements present in a compound is called the
Empirical formula
The chemical formula which shows the exact number of atoms of all the elements present in a compound is called the
Molecular formula
When an atom loses an electron it forms
Cation
When an atom gains an electron it forms
Anion
The maximum number of electrons that the first energy level can accommodate is
2
The X-rays are discovered by
W.C. Roentgen
Refers to atoms or ions, which have the same electronic configuration.
Isoelectronic
Which group of the periodic table is known as the akali metals?
Group I
Which group is known as the halogens?
Group VII
The horizontal arrangement of elements increasing atomic number in a periodic table is called:
Period
The number of protons in the nucleus of an atom is called
Atomic number
The measure of the resistance of an object to a change in its state of motion is called
Inertia
Refers to agreement of a particular value with the true value
Precision
Refers to the degree of agreement among several measurements of the same quantity
Accuracy
A property of matter often used by chemist as an “identification number” for a substance
Density
Protons and neutrons can be broken down further into elementary particles called
Quarks
The principle of constant composition of compound, originally called “Proust’s Law” is now known as
Law of definite proportion
The mass that enters into a chemical reaction remains the unchanged as a result of the reaction. In precise form: mass is neither created nor destroyed. This is known as:
The law of conservation of mass
When the same elements can form two different compounds, the ratio of masses of one of the elements in the two compounds is a small whole number relative to a given mass of the other elements. This is known as:
The law of multiple proportion
The ratio of the density of the test liquid to the density of the reference liquid is called
Specific gravity
How many electrons are there in a covalent bond?
2
SI unit of temperature
Kelvin
The elements that a compound is composed of is present in fixed and precise proportion by mass. This is known as
Law of constant composition
The mass to the nearest atomic-mass unit of an atom which contains 9 protons and 10 neutrons
19 amu
The net electric charge of any atom is
0
The tendency of atoms to attract electrons into their valence shells to form anions is described by the concept of
Electron affinity
The tendency of atoms to attract electrons shared in a covalent bond is called
Electronegativity
A covalent bond between atoms of identical electronegativity is called
Nonpolar
A formula which describes only the number of each element in the molecule is called the
Molecular formula
The formula which shows how atoms are joined together is called the
Structural formula
The pairs of electrons not shared in the covalent bond are called
Nonbonded electrons or lone pair
The word atom comes from the Greek word ”atomos” meaning
Cannot be cut
Under normal state an atom is said to be
Electrically neutral
The word electron comes from the Greek word ”elektron” meaning
Amber
The word proton comes from the Greek word ”proteios” meaning
Of first importance
A solid which has no crystalline structure is called
Amorphous
A chemical substance which readily evaporates and readily diffuses at ordinary room temperature and pressure conditions is called
Volatile
Which of the following falls under fluids
Both liquid and gas
The gases that rarely take part in a chemical reaction are called
Noble gases
Which type of ions, metals form when enter into a chemical reaction
Positive ions
The chemical name for baking soda
Sodium bicarbonate
The subatomic particle with a negative charge and mass of 9.1 x 10^ -31 kg is
Electron
The subatomic particle with a positive charge of mass 1.6 x 10 -27 kg is
Proton
Neutron was discovered by
Chadwick
1 comments:
Post a Comment