Atomic Structure Test

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

Tags

NGSS.MS-PS1-1

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

• 5

• 6

• 8

• 11

Tags

NGSS.MS-PS1-1

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

A. 5 B. 6 C. 8 D. 11

• 5

• 6

• 8

• 11

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

Tags

NGSS.MS-PS1-1

Which particles determine the atomic number of an element?

• protons

• Neutrons only

• Neutrons and protons

• None of the above

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

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

• 1

• 2

• 8

• 18