integrated science unit 4 2021

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What happens when an atom has more neutrons than another atom?

Back

It becomes an isotope and has more mass.

Front

What distinguishes Neon-20 from Neon-22?

Back

They have different numbers of neutrons.

Front

What is the mass number of an atom?

Back

The mass number is the sum of the number of protons and the number of neutrons in the nucleus of an atom.

Front

Which row of the Periodic Table does an element with atomic number 10 belong to?

Back

Row 2.

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.

Front

What are electrons?

Back

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

Front

Define 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

What is the significance of the Periodic Table?

Back

The Periodic Table organizes elements based on their atomic number and properties.