Chemistry
Grade-9
Easy
Question
Name this element.
- Boron
- Sodium
- Lithium
- Beryllium
Hint:
Electrons revolve around the nucleus in a orbit.
The correct answer is: Beryllium
- Electrons revolve around the nucleus in a orbit.
- Nucleus is a positively charged center in an atom.
- Here in the model 4 electrons are rotating around the nucleus, considering the atom to be neutral we can say 4 protons are present. Therefore, atomic number is 4 and the element is beryllium.
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