Chemistry Midterm Review

Front

Elements in Group 17 of the periodic table are known as:

Back

Halogens

Front

Which of the following is a pressure value?

Back

258 mmHg

Front

Which of the following best describes an exothermic reaction?

Back

It releases heat to the surroundings.

Front

In the periodic table, elements in the same vertical column are called:

Back

Groups

Front

How many valence electrons does nitrogen (N) have?

Back

5

Front

What is the definition of a chemical reaction?

Back

A process that leads to the transformation of one set of chemical substances to another.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What are alkali metals?

Back

Elements in Group 1 of the periodic table, highly reactive and have one valence electron.

Front

What is an endothermic reaction?

Back

A reaction that absorbs heat from the surroundings.

Front

What is the pH scale?

Back

A scale used to measure the acidity or basicity of a solution, ranging from 0 to 14.