Steel is an alloy and consists of more than one element (mainly iron and carbon), therefore steel is a mixture.
The answer is (2) A bond is formed and energy is released. The left side of equation is I atom and the right side of equation is I2 molecule. So the bond is formed between I atom to form I2 molecule. And forming bond will release energy while breaking bond will absorb energy.
b. o2
oxygen is diatomic because 1 molecule is made of 2 atoms of oxygen
Answer:

Explanation:
Oxygen has eight eletrons and six valence electrons, giving it the electron configuration of
.
It has to be moist in the grass