Asodium atom that has lost an electron comes near a chlorine atom that has
gained an electron. what happens?

a. they form an ionic compound.

b. they form a peptide compound.

c. they form a hydrogen bond.

d. they form a covalent bond.

When a sodium atom that has lost an electron comes near a chlorine atom that has gained an electron, an ionic bond is formed.

Explanation:

The bonds which are produced between a metal ion and a non-metal ion are termed as ionic bonds. Sodium is metal while chlorine is a non-metallic element, ionic bonds are formed in between them.

Sodium has one electron in its outer most shell whereas a chlorine atom has seven electrons in its outermost shell. To become stable, sodium donates its electron to the chlorine atom and hence ionic bond is formed between them.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products