Chemistry review

Front

Where are electrons located in an atom?

Back

Electrons are located outside the nucleus of an atom.

Front

What kind of changes create new substances?

Back

Chemical changes create new substances.

Front

What type of charge does a proton have?

Back

A proton has a positive charge.

Front

What does the atomic number tell you?

Back

The atomic number tells you the number of protons in the nucleus and the element's place on the periodic table.

Front

How do you find the number of neutrons in an atom?

Back

To find the number of neutrons, round the atomic mass and subtract the number of protons.

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What is a chemical reaction?

Back

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

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 periodic table?

Back

The periodic table is a tabular arrangement of elements, organized by increasing atomic number and grouped by similar properties.