Atomic Structure and Periodic Table

Front

What is the charge of an electron?

Back

Negative.

Front

Isotopes of the same element must have the same number of _____________.

Back

protons.

Front

The alkaline earth metals are in group __________ and have __________ valence electrons.

Back

Group 2 and 2.

Front

Group 17 elements are called the __________ __________.

Back

Halogens.

Front

What is the average of all the masses of an atom's isotopes?

Back

Atomic Mass.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What are valence electrons?

Back

Electrons in the outermost shell of an atom that determine its chemical properties.

Front

What is the periodic table?

Back

A tabular arrangement of elements organized by increasing atomic number.

Front

What are noble gases?

Back

Elements in Group 18 that are inert and have full valence shells.