17h) TEST - Atoms

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It consists of a nucleus containing protons and neutrons, surrounded by electrons.

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom. The number of protons determines the atomic number and the identity of the element.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom. They contribute to the mass of the atom but do not affect its charge.

Front

What are electrons?

Back

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

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's identity.

Front

What is the mass number?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.

Front

What is a Lewis dot diagram?

Back

A Lewis dot diagram is a representation of an atom that shows its valence electrons as dots around the element's symbol.

Front

How many valence electrons does Magnesium have?

Back

Magnesium has 2 valence electrons.

Front

What is an isotope?

Back

An isotope is a variant of an element that has the same number of protons but a different number of neutrons.

Front

How many electrons does Fluorine have?

Back

Fluorine has 9 electrons.