Elements and Reactivity

What element is this?

• Lithium

• Aluminum

• Silicon

• Cobalt

What element is this?

• Beryllium

• Carbon

• Helium

• Magnesium

What element is this

• Carbon

• Oxygen

• Helium

• Phosphorus

How many valence electrons does this element have?

• 13

• 14

• 3

• 8

Is this element reactive?

• Yes

• No

• We can't tell from this picture

Is this element reactive or stable?

• Reactive

• Stable

What element is this?

Is this element reactive or stable?

• Reactive

• Stable

What element is this

• Hydrogen

• Helium

• Beryllium

• Carbon

Is this element reactive or stable?

• Reactive

• Stable