Chemistry Semester 1 Review

Front

What is the formula for dinitrogen pentoxide?

Back

N₂O₅

Front

What is an isotope?

Back

A variation of atoms of the same element.

Front

What is an ion?

Back

An atom or bonded group of atoms with a positive or negative charge.

Front

What state of matter has a definite volume but no shape?

Back

Liquid.

Front

What is a law in scientific terms?

Back

A rule or principle that describes natural phenomena.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the pH scale used for?

Back

To measure the acidity or basicity of a solution.

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

Mass is neither created nor destroyed in a chemical reaction.