Question

1.
2.
3.
4.
Give one word for the following:
the substances formed during a chemical reaction
the symbolic representation of a chemical reaction
the change in which heat is absorbed
substances written on the LHS of the arrow in a chemical reaction​

Answer 1

${\huge{\rm{\underbrace{1.~reactants~and~products\checkmark}}}}$

These starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products.

2. A chemical equation is the symbolic representation of a chemical reaction. The reactants (the starting substances) are written on the left, and the products (the substances found in the chemical reaction) are written on the right

${\huge{\rm{\underbrace{3.~endothermic~reaction\checkmark}}}}$

A chemical reaction or physical change is endothermic if heat is absorbed by the system from the surroundings. In the course of an endothermic process, the system gains heat from the surroundings and so the temperature of the surroundings decreases

${\huge{\rm{\underbrace{4.~reactants\checkmark}}}}$

The substance(s) to the left of the arrow in a chemical equation are called reactants.