Answer:
ok and thank you for free point
It tends to in increase because the size of the atoms increase.
<h2><u>Answer</u> :</h2>
The most appropriate option is :

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

Answer:
I have the same
Explanation:
like I have the same homework as you are u in my class lol?
Answer:
2.645
Explanation:
Rate of diffusion formula:
Sqrt(mass2/mass1)
>>sqrt(14/2)
(Note:Hydrogen must exist in dwiatomic, [H2])