Atomic and mass number — task. Science State Board, Class 7.

PDF chapter test TRY NOW

Find the analogy:

Answer variants:

Helium

2

13

1. K : Potasium :: He :

2. Magnesium : 12 :: Helium :

Login or Fast registration

Previous exercise

Exit to the topic

Did you find an error?

Register for free to see more content

Register for free to see more content