Periodic Table and Atomic Structure Review

The farther an electron is from the nucleus, the more it has

• charge

• energy

• mass

• size

Atoms of the same element that have different numbers of neutrons are called

• molecules

• ions

• protons

• isotopes

The total number of electrons in the outer shell of a sodium atom is

• 1

• 2

• 8

• 18

The total number of neutrons in the nucleus of any atom is equal to the

• mass number of the atom

• atomic number of the atom

• atomic number minus the mass number

• mass number minus the atomic number

Two different isotopes of an element have different

• numbers of neutrons

• number of protons

• atomic numbers

• nothing is different about them

Two different isotopes of an element have the same

• number of neutrons

• number of protons

• mass numbers

• nothing is the same about them

The maxium number of electrons that can occupy the 2nd shell of an atom of magnesium is

• 1

• 2

• 8

• 18

The mass of the most common isotope of an element is known based an element's

• Mass number

• Average atomic mass

• Atomic number

• Number of electrons

Which part of the periodic table indicates the number of energy levels in the electron cloud?

• Group

• Family

• Valence Electrons

• Period

How many electrons can be held in the first energy level?

• 2

• 6

• 8

• 16