Unit 2 Review

Front

What is the atomic number of an atom equivalent to?

Back

The atomic number is equivalent to the number of protons in the nucleus.

Front

How do you calculate the average atomic mass of an element with multiple isotopes?

Back

Average atomic mass = (fraction of isotope 1 * mass of isotope 1) + (fraction of isotope 2 * mass of isotope 2) + ...

Front

How many electrons are in an electrically-neutral atom of nitrogen?

Back

An electrically-neutral atom of nitrogen has 7 electrons.

Front

What is the name of the ionic compound Cs2S?

Back

The name of the ionic compound Cs2S is cesium sulfide.

Front

What are elements in group 17 called?

Back

Elements in group 17 are called Halogens.

Front

What is the definition of an isotope?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the significance of the atomic mass unit (amu)?

Back

The atomic mass unit (amu) is a standard unit of mass that quantifies mass on an atomic or molecular scale.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.