atoms and molecules

Front

What is an atom?

Back

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

Front

What are molecules?

Back

Molecules are groups of two or more atoms bonded together.

Front

What charge does a neutron have?

Back

A neutron has no charge; it is neutral.

Front

What are the three states of matter?

Back

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

Front

How many hydrogen atoms are in a water molecule (H2O)?

Back

There are 2 hydrogen atoms in a water molecule.

Front

Is CO2 a molecule?

Back

Yes, CO2 (carbon dioxide) is a molecule.

Front

What is a chemical reaction?

Back

A chemical reaction is a process where substances (reactants) are transformed into different substances (products).

Front

What is the role of electrons in atoms?

Back

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

Front

What is the periodic table?

Back

The periodic table is a chart that organizes all known elements based on their atomic number and properties.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.