The starting materials in a chemical reaction are called blank

Hello!

The answer is: reactants... or can be called reagents too.

In every chemical reaction, we have the reactants. The reactants are the starting materials which after a chemical reaction will be transformed in products. After every chemical reaction, we have the products, but we also can have reactants (it happens when not all the reactants are used).

For example, given the following reaction:

NH3+ 2O2 → HNO3 + H2O

Reactants are: NH3 and 2O2

Products are: HNO3 and H2O

Have a nice day!

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.