Valence Electrons and Ions

Atoms of elements that are in the same group have the same number of

• protons.

• neutrons.

• valence electrons.

• protons and neutrons.

If an element has 3 valence electrons, what charge will likely form on its ion ?

• +3

• +5

• -3

• -5

Sodium loses an electron. What is its ionic charge?

• neutral 

• -1

• +1

• +11

What charge does an atom have if it LOSES an electron? 

• Positive (+)

• Negative (-)

Group 15 elements tend to form ions by ___.

• gaining 3 electrons

• losing 3 electrons

• losing 5 electrons

• gaining 5 electrons

Tags

NGSS.HS-PS1-2

What are valence electrons?

• The total number of electrons in an atom

• The number of electrons in the outermost shell

• The number of electrons in the second shell

• The number of protons in the outermost shell

Most elements will gain or lose electrons so that they end up with _______ valence electrons.

• 2

• 6

• 8

• 10

In the picture, which Bromine (Br) Lewis dot diagram is given correctly?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-1

Identify the element that has 1 valence electron?

• Rb

• Cl

• Ag

• Ca

In which energy level are the valence electrons located for this atom?

1s² 2s² 2p⁶ 3s²

• 1

• 2

• 3

• 8

Tags

NGSS.HS-PS1-1