Unit 2, 3, & 4 Review

Front

Balance the following equation: 14_6C --> 0_-1e + ________

Back

14_7N

Front

In what part of an atom can protons be found?

Back

Inside the atomic nucleus

Front

What is the charge of an atom that has gained one electron?

Back

-1

Front

What happens when the number of protons in an atom changes?

Back

It becomes a completely different atom, with different properties.

Front

The time needed for half of a radioactive sample to decay is called its __________.

Back

half-life

Front

What is the definition of an atom?

Back

The smallest unit of matter that retains the properties of an element.

Front

What are neutrons?

Back

Neutral particles found in the atomic nucleus.

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 radioactivity?

Back

The process by which unstable atomic nuclei lose energy by emitting radiation.