Choose the best: Modern periodic law — task. Science State Board, Class 10.

PDF chapter test TRY NOW

Select the right answers:

1. Modern periodic law is based on __________.

atomic mass
ionisation energy
atomic number
atomic radii

2. In 1912, Henry Moseley, a British scientist, discovered the __________.

Electronegativity
Atomic ratio
Atomic number
Atomic mass

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