mils

Atoms of elements in the same group of the periodic table share the same

• number of energy levels

•  number of valence electrons

• atomic numbers

• atomic masses

What is an atom’s nucleus made of?

•  protons and electrons

•   protons only

• protons and neutrons

• neutrons only

How many electrons will a neutral atom of carbon have if its nucleus has 6 protons and 8 neutrons?

• 2

• 6

• 8

• 14

 An element with 5 protons, 6 neutrons, and 8 electrons has an atomic number of

• 5

• 6

• 8

• 11

 An element with 5 protons, 6 neutrons, and 8 electrons has a mass number of

• 5

• 6

• 8

• 11

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

• lons

• protons

• isotopes

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

• 1

• 2

• 8

• 18

Which particles determine the atomic number of an element?

• Protons only

• Neutrons and protons

•  Neutrons only

• Neutrons only

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