Chemistry Unit 2 Review

Front

The period for Bromine is ___________.

Back

4

Front

Which is an alkali metal?

Back

Sodium

Front

Which formula could match the molecule in this image?

Back

CO₂

Front

How many atoms of carbon (C) are in C₆H₁₂O₆?

Back

6

Front

An isotope of an element has the same number of _________, but a different number of _________.

Back

Protons, neutrons

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

Define an ion.

Back

An atom or molecule that has a net electric charge due to the loss or gain of one or more electrons.

Front

What is the difference between an element and a compound?

Back

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

Front

What is the law of conservation of mass?

Back

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

Front

What is a chemical reaction?

Back

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