The word “atom” comes from the Greek word “atomos” which means

An instrument that separates particles of different isotopic composition and measure their individual relative masses.

These are compounds containing water molecules loosely bound to the other components.

If a more active element replaces a less active one in a compound, the reaction is:

If a single reactant is transformed by heat or electricity into two or more products, the type of reaction is

The statement “mass is neither created nor destroyed in a chemical reaction” is known as:

What kind of chemical bond will form in binary compounds where the electronegativity difference between atoms is greater than 2.0

What kind of chemical bond will form in binary compounds where the electronegativity difference between atoms is less than 1.5?

The element which has a mass of about 9 amu is beryllium (Be), atomic number 4. What is the charge on the Be atom?

The horizontal arrangement of elements of increasing atomic number in a periodic table is called:

Refers to atoms or ions, which have the same electronic configuration

Which group of the periodic table is known as the alkali metals?

Which group is known as the halogens?

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:

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 element. This is known as:

The ratio of the density of the test liquid to the density of a reference liquid is called:

How many electrons are there in a covalent bond?

The elements that a compound is composed of are present in fixed and precise proportion by mass. This is known as:

The mass to the nearest atomic-mass unit of an atom which contains 9 protons and 10 neutrons

The number of protons in the nucleus of an atom is called

The measure of the resistance of an object to a changed in its state of motion is called

Refers to the agreement of a particular value with the true value.

Refers to the degree of agreement among several measurements of the same quantity.

A property of matter that is often used by chemist as an “identification tag” for a substance.

Protons and neutrons can be broken down further into elementary particles called

The principle of the constant composition of compounds, originally called “Proust’s Law” is now known as

The mass of an alpha α particle is how many times more than that of the electron?

Atoms with the same number of protons but different number of neutrons are called

The forces that hold atoms together are called

An atom or group of atoms that has a net positive or negative charge is called

A positive ion is called

A negative ion is called

The force of attraction between oppositely charged ions is called

The horizontal arrangement of elements of increasing atomic number in a periodic table is called

The vertical arrangement of elements in the periodic table is called

If the number of gas molecule is doubled in a certain volume of gas the pressure

A symbolic representation to emphasize the valence shell of an atom is called

For which elements do the number of electrons in their outer or valence shell correspond to their group number?

What is the maximum number of electrons that can fit into a “p” orbital?

Atoms or ions which have the same electronic configuration

Which group of the periodic table is known as the alkali metals?

Which group of the periodic table is known as the halogens?

Which group of the periodic table is known as the alkaline earths ?

Which group of the periodic table is known as the noble gases?

The components resulting from the reactions are called

What kind of chemical bond will form in binary compounds where the electronegativity difference between atoms is less than 1.5?

Compounds which contain only carbon and hydrogen are called

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 (not solvent) is expressed in volume units, i.e., milliliters.

The earth’s crust consists of ___ % of oxygen.

The human body consists of ___ % of carbon.

What kind of chemical bond will form in binary compounds where the electronegativity difference between atoms is greater than 2.0

The property of liquid which describes their resistance to flow is called

The anions and cations which are unaffected by the reaction in solution are called

A reaction in which heat is produced is called

A reaction in which heat is absorbed is called

In oxidation-reduction or redox reactions, the component supplying the electrons is called the

In oxidation-reduction or redox reactions, the component receiving the electrons is called

A covalent bond formed by the combination of collinear p orbitals is also called a

The tendency of atoms to attract electrons into their valence shells to form anions is described by the concept of

The tendency of an atom to attract electrons shared in a covalent bond is called

A covalent bond between atoms of identical electronegativity is called

A formula which describes only the numbers of each element in the molecule is called

The formula that describes how atoms are joined together is called the

The pairs of electrons not shared in the covalent bond are called

The word atom comes from the Greek word, atomos meaning

The central part of an atom is called the

The mass of a proton is about how many times the mass of an electron?

The particles in the nucleus, namely the neutrons and the protons, are collectively referred to as

The number of orbiting electrons is normally ________the number of protons in the nucleus of an atom.

The net electric charge on any atom is

Under normal state, an atom is said to be

The word electron comes from the Greek word “elektron” which means

The word proton comes from the Greek word “proteios” meaning

A solid which has no crystalline structure is called

The dry air is composed of ___ percent of nitrogen

The dry air is composed of ___ percent of oxygen.

___ percent of carbon dioxide is present in dry air.

A chemical substance which readily evaporates and readily diffuses at ordinary room temperature and pressure conditions is called

Which of the following falls under fluids?

The gases that rarely take part in a chemical reaction are called

Which type of ions, metals form when enter into a chemical reaction?

Which of the following is the most abundant element in terms of the number of atoms?

Which is the most abundant element in the human body?

The chemical name for baking soda i

The subatomic particle with a negative charge and mass of 9.1 X 10-31 kg is

The subatomic particle with a positive charge and mass of 9.1 X 10-27 kg is

Who discovered the neutron?

Electron was discovered by

The isotopes of an element differ in the number of

The isotope of hydrogen is

The isotope of hydrogen with only one neutron is called

The isotope of hydrogen with two neutrons is called

The atoms having different atomic numbers but the same mass number are called

The atoms which have the same number of neutrons but different mass numbers are called

Rutherford model of an atom had failed to explain

The concept that electrons revolve around the nucleus in specific paths called orbits or energy levels was proposed by

The number of atoms (6.023x1023) present in 12 grams of carbon-12 is called

The chemical formula which shows the relative number of atoms of all the elements present in a compound is called

The chemical formula which shows the exact numbers of atoms of all the elements present in a compound is called

The X-rays were discovered by