Atomic Structure Milestone Review

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 neutros

• Neutrons only

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

• 2

• 6

• 8

• 14

Tags

NGSS.MS-PS1-1

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

• 5

• 6

• 8

• 11

Tags

NGSS.MS-PS1-1

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

• 5

• 6

• 10

• 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

• ions

• 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

• Protons and electrons

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