I believe Mendeleev formed his periodic table by atomic weight (nowadays we do it by atomic number) so he likely used those values.
Answer:
Explanation:
mass of the reactant = mass of the product
15.31 + 1.50 = 16.81g
<h2><u>Answer</u> :</h2>
The most appropriate option is :

Since, they are the most abundant elements found in Earth's Crust.

Answer:
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Explanation:
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Answer:
I think option (d) is right answer