Basic Atomic Structure - Understanding Check

Front

Which subatomic particle has a negative charge?

Back

Electron

Front

What is the atomic number of oxygen?

Back

8

Front

How many protons does the element with atomic number 7 have?

Back

7

Front

In a chemical symbol, what does the 'X' represent?

Back

Element symbol

Front

What are the positively charged particles in an atom called?

Back

Protons

Front

What is the charge of a neutron?

Back

Neutral (no charge)

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What is the difference between atomic number and mass number?

Back

Atomic number is the number of protons; mass number is the total of protons and neutrons.

Front

What particle is found in the nucleus of an atom and has a positive charge?

Back

Proton

Front

What is the role of electrons in an atom?

Back

Electrons are involved in chemical bonding and reactions.