1st Semester Exam prep

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.

Front

What does it mean for a reaction to be exothermic?

Back

An exothermic reaction is a chemical reaction that releases energy in the form of heat or light.

Front

What is the charge of the nucleus of an atom due to?

Back

The charge of the nucleus of an atom is due to the presence of positive protons.

Front

What is the atomic number of an element?

Back

The atomic number of an element is the number of protons in the nucleus of an atom of that element.

Front

What is atomic mass?

Back

Atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom, contributing to its mass but not its charge.

Front

What are compounds?

Back

Compounds are substances formed when two or more elements chemically bond together in fixed proportions.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not alter the chemical composition of a substance, while chemical changes do.

Front

What is a reactant?

Back

A reactant is a substance that undergoes a chemical change in a reaction.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.