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 number

• 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 tin have if its nucleus has 50 protons and 68 neutrons?

• 18

• 50

• 68

• 118

An element with 7 protons, 6 neutrons, and 9 electrons has an atomic number of

• 7

• 6

• 9

• 13

Tags

NGSS.MS-PS1-1

An element with 7 protons, 6 neutrons, and 9 electrons has a mass number of

• 7

• 6

• 9

• 13

Tags

NGSS.MS-PS1-1

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

• isotopes

• protons

The total number of electrons in the outer shell of an oxygen atom is

• 2

• 6

• 8

• 16

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