Matter and energy review

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Front

What is energy?

Back

Energy is the ability to do work or produce change.

Front

What are the three states of matter?

Back

The three states of matter are solid, liquid, and gas.

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 are some signs of a chemical reaction?

Back

Signs of a chemical reaction include color change, gas production, temperature change, and the formation of a precipitate.

Front

What is the role of electrons in an atom?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom and are involved in chemical bonding.

Front

What is the nucleus of an atom composed of?

Back

The nucleus of an atom is composed of protons and neutrons.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element.

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 lithium and what is its atomic number?

Back

Lithium is a chemical element with the symbol Li and atomic number 3.