Question

2- Fill in the blanks 5M
Molar mass of _________ moles of water is 90 grams.
The one mole of sodium chloride has one _________ and one chlorine.
hydrogen and __________ lightest gases in nature.
The___________ of any atom have same atomic number and different atomic masses.
The sulphate ion has ___________ charges.

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Answer 1

1. sodium

2.helium

3. isotope

4. 2- charge