Ions & Valence Electrons

What happens to an atom when they gain or lose electrons?

• They change what element they are
• They lose protons too
• They become charged
• They explode

What is the name given to charged particles?

Protons have a ​ (a)   charge.

Electrons have a ​ (b)   charge.

• positive
• negative
• neutral

If an atom loses electrons it will become ________ charged

• Negatively

• Positively

• Oppositely

• Neutrally

What is the name given to positively charged ions?

• Cations
• Anions

What is the name given to negatively charged ions?

• Cations
• Anions

What is the name given to the outermost electron shell?

• valence shell
• outside shell

• random shell

• shell 1

How many electrons does an atom of fluorine have?

• 2

• 9

• 7

• 19

How many valence (outermost) electrons does an atom of fluorine have?

• 2

• 9

• 7

• 19

In order to have a full valence shell, what will fluorine do?

• Lose 7 electrons

• Gain 1 electron

• Lose all electrons

• Explode