Molecules

Front

What is the atomic number of an element?

Back

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

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is the chemical formula for water?

Back

H₂O, which indicates that each molecule of water is made up of two hydrogen atoms and one oxygen atom.

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom, contributing to the atomic mass.

Front

What are electrons?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is made up of two or more atoms bonded together.

Front

What is matter?

Back

Matter is anything that has mass and takes up space, including solids, liquids, and gases.

Front

What is the significance of the atomic number in the periodic table?

Back

The atomic number determines the position of an element in the periodic table and its chemical properties.

Front

How many atoms are in a molecule of carbon dioxide (CO₂)?

Back

There are three atoms in a molecule of carbon dioxide: one carbon atom and two oxygen atoms.