Your answer is C - Melting of a substance
Answer:
2Na + F2 → 2NaF
Explanation:
A balanced equation is an equation in which the number of the individual atoms on the left side is the same with that on the right side of the equation. This is true as explained by the law of conservation of matter.
From the options above only the equation given below is balanced :
2Na + F2 → 2NaF
There are 2 atoms of Na both on the left and on the right. There are also 2 atoms of F both on the left and right side
The electron gain for iron means that it is reduced (answer C)
Explanation
Redox reaction is made up of two halves.
That is a reduction half and a oxidization half.
In the reduction half electrons are gained which result to decrease in oxidation number.
In the Oxidization half electrons are lost which result to increase in oxidation number.
iron is therefore reduced since it gains electrons
White is the answer to this
Answer:
Explanation:
Octet, in chemistry, the eight-electron arrangement in the outer electron shell of the noble-gas atoms. This structure is held responsible for the relative inertness of the noble gases and the chemical behaviour of certain other elements.