Subatomic Particles
Atomic Structure
Electron Configuration
Basics
Periodic Table Connections
Challenge Advanced Concepts
100

This is the positively charged particle found in the nucleus of an atom.

What is a proton?


100

The center of an atom, containing protons and neutrons, is called this.

What is the nucleus?

100

This is the maximum number of electrons that can fit in the first energy level (shell) of an atom.

What is 2?


100

The number of protons in an atom is also known as this.

What is the atomic number?


100

This subatomic particle determines the chemical properties of an atom.

This subatomic particle determines the chemical properties of an atom.

200

This subatomic particle has no electrical charge and is found in the nucleus.

What is a neutron?


200

Electrons are found in these regions around the nucleus.

What are energy levels or shells?


200

This is the maximum number of electrons that can fit in the second energy level (shell) of an atom.

What is 8?


200


Elements in the same column (group) of the periodic table have the same number of these in their outer shell.


What are valence electrons?


200

This is the charge of a neutron.


What is 0 or neutral?


300

This negatively charged particle orbits the nucleus of an atom.

What is an electron?


300

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

What is the mass number?


300

The arrangement of electrons in an atom is called this.

What is electron configuration?


300

What are noble gases?


This group of elements has a full outer shell of electrons and is very stable.

300

What is a cation?


This is the name for a positively charged ion.


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