(Q2) Benchmark Review

Front

What color is the sodium atom?

Back

Green.

Front

What is the atomic composition of a molecule with 2 oxygen and 1 silicon?

Back

The molecule consists of 2 oxygen atoms and 1 silicon atom.

Front

In a chemical reaction, what happens to atoms?

Back

Atoms separate, rearrange, and new bonds form.

Front

What is an endothermic reaction?

Back

A reaction in which more energy is absorbed by the reactants than released by the products.

Front

What color is the chlorine atom?

Back

Purple.

Front

What is the definition of an atom?

Back

The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

What is the difference between an exothermic and an endothermic reaction?

Back

Exothermic reactions release energy, while endothermic reactions absorb energy.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed.