Introduction to Chemistry

Front

Law of definite proportions

Back

states that two samples of a given compound are made of the same elements in exactly the same proportions by mass regardless of the sizes or sources of the samples.

Front

Law of multiple proportions

Back

states that two or more different compounds are composed of the same two elements, the ratio of the masses of the second element (which combines with a given mass of the first element) is always a ratio of small whole numbers.

Front

Law of conservation of mass means

Back

states that the mass of reactants in a reaction equals the mass of the products

Front

Which statement accurately describes the Atomic Theory?

Back

The atomic theory states that atoms are the building blocks of all matter.

Front

The particle which is located in the nucleus and has a positive charge is:

Back

proton

Front

The particle which is located in the nucleus and has a neutral charge is:

Back

neutron

Front

How is the nucleus a part of an atom?

Back

It is located in the central part of the atom and contains the protons and neutrons.

Front

What is the mass number equal to?

Back

equal to the total number of particles of the nucleus (protons and neutrons).

Front

Atoms of the same element have different numbers.

Back

True

Front

Isotopes are:

Back

when atoms of the same element have different numbers of neutrons.