valence electron 2

How many valence electrons are in an atom of Se?

• 2
• 8
• 6
• 5

Tags

NGSS.HS-PS1-1

How many valence electrons are in an atom of Ba?

• 2
• 8
• 4
• 1

Tags

NGSS.HS-PS1-1

• 2
• 8
• 3
• 13

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Valence electrons are the...

• Innermost electrons
• Middle electrons
• Outermost electrons
• Any electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

USE THE PERIODIC TABLE

Find the element that has 3 Valence Electrons and 2 energy levels.

• Magnesium - Mg

• Lithium - Li

• Aluminum - Al

• Boron - B

Tags

NGSS.HS-PS1-1

USE THE PERIODIC TABLE

Find the element that has 5 Valence Electrons and 4 energy levels.

• Arsenic - As

• Selenium - Se

• Calcium - Ca

• Vanadium - V

Tags

NGSS.HS-PS1-1

Br forms an ion with a charge of ________

• -1

• -2

• +1

• +2

Sr forms an ion with a charge of _________.

• +1

• +2

• -1

• -2

When an atom gains electrons, it has a ________ net charge.

• positive

• negative

When an atom loses electrons, it has a ________ net charge.

• positive

• negative