Atomic Number Questions and Answers

It's 2 as first it's hydrogen then helium then no. 3 is lithenium

5 Answers

Atomic number of helium is 2

2 Answers

On the periodic table, each element is assigned an atomic number. Besides showing its placement on the periodic table, the atomic number shows the number of protons located in the center of the ...

4 Answers

12 protons and 12 electrons. Please correct this answer I would like to use this quiz.

3 Answers

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