CO 2 is an element. true or false

false

Explanation:

f this helps typically an element wont have a 2 next to it, to see if something is an element or compound check for the element on the periodic table and see if the structure or name matches the one given to you on the question. for example here it is Co2 on the periodic table it's simply written as Co

co2 or carbon dioxide is a  compound not an element, you can even check this on the periodic table

true

Explanation:

co2 is carbon dioxide

Hope this helps.

120,630,890

step-by-step explanation:

110+10=120,620+10=630,880+10=890

it is the most commonly accepted one