Atomic Number

The atomic number of Cobalt (Co) is

• 27

• 26

• 25

• 24

What is the atomic number of this nucleus?

• 1

• 3

• 4

• 7

Tags

NGSS.MS-PS1-1

This particle determines what element you have - the elements identity.

• electron

• proton

• neutron

• valence shell

An element with 12 protons in each atom has an atomic number of:

• 12

• 21

• 2

• 24

Tags

NGSS.MS-PS1-1

True or false: The atomic number of an element is the same as the number of protons of its atoms.

• True

• False

An element with 3 protons in each atom has an atomic number of:

• 1

• 2

• 3

• 4

An atomic number of 8 means the atom has ________ protons.

• 7

• 8

• 16

• 88

An element with 20 protons in each atom has an atomic number of:

An element with 64 protons in each atom has an atomic number of:

True or false: If the number of protons changes in an atom, it becomes a different element.

• True

• False