Science - Atoms, Elements, Molecules and Compounds

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What is an atom?

Back

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

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

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What is an element?

Back

A pure substance that cannot be broken down into simpler substances and is made of only one type of atom.

Front

What is a compound?

Back

A substance formed when two or more different elements bond together in a fixed ratio.

Front

What are protons?

Back

Positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutral particles found in the nucleus of an atom that do not have a charge.

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What are electrons?

Back

Negatively charged particles that orbit the nucleus of an atom.

Front

How do you identify an element?

Back

By the number of protons in its nucleus, known as the atomic number.

Front

What is the difference between an atom and a molecule?

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

Front

What is the role of electrons in an atom?

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Electrons are involved in chemical bonding and determine the atom's charge.