PDF chapter test TRY NOW
Select the right word given in the box:
neutral | hydrogen | Proton |
subatomic particles | Valency | number of protons |
Negative | Electron | Mass number |
atom | nucleus | empty space |
1. An atom is electrically.
2. is defined as the combining capacity of an element.
3. The element having no neutron in the nucleus of its atom is.
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