Atomic Structure

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Value representing the number of protons in an element

• Atomic Mass

• Mass Number

• Valence Electrons

• Atomic Number

The smallest particle of an element that shows all the properties of that element.

• Subatomic Particles

• Atom

• Quarks

• Gluons

Where electrons are likely to be found as they travel around the nucleus

• Nucleus

• Electron Cloud

• Within a Proton

• Within a Neutron

A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass

• Electron Shells

• Orbitals

• Electron Cloud

• Nucleus

The nucleus of an atom is made of

• electrons and protons

• electrons and neutrons

• protons and neutrons

• empty space

Outside the nucleus of an atom are these

• protons

• neutrons

• quarks

• electrons

Which part of the diagram represents the proton?

• a

• b

• c

• d

Which TWO particles can be changed within an element without changing what the element is?

• Neutrons

• Electrons

• Protons

Subatomic particles with a positive charge

• neutrons

• atomic mass

• protons

• isotopes