Answer:
Period
Explanation:
If we ubicate te period one on the alkaline metals, we can see the lithium, so we go to the borans on te group AIII an we see Boron, move to the rigth on the same sense tou the group AVI we see the Oxygen, we can know that also for the electronic configuration Li:1s²2s¹ B:1s²2s²3p
True because they are organically made without any things that include chemicals
The production of
is
. Converting mass into kg,
1 ton=907.185 kg, thus,

Thus, production of
will be
.
The specific volume of
is
.
Volume of
produced per day can be calculated as:

Putting the values,

Thus, volume of
produced per year will be:

Thus, in 4 year volume of
produced will be:

Nickel is a pure substance
Rust is also a pure substance