Atomic Theory Scientists and Subatomic Particles

The subatomic particle of an atom that orbits around the nucleus and has a negative charge...

• Proton
• Neutron
• Electron
• Quark

How many protons are in Cadmium?

• 112.411
• 170
• 64
• 48

How many neutrons does Argon have in it's nucleus?

• 39.948
• 58
• 22
• 18

The ______________ is the number of protons + neutrons in the nucleus of an atom.

• atomic number
• net charge
• chemical symbol
• mass number

Changing the number of protons in an atom will change the atom's _____

• color

• atomic weight/mass

• net charge

• identity (name of element)

In the nucleus you can find the

• Protons, neutrons and electrons

• Protons and neutrons

• Protons and electrons

• Neutrons

All of the mass of an atom is located in the -

• Electron cloud

• Core

• Nucleon

• Nucleus

What is represented by the letter R?

• Nucleus

• Electron

• Proton

• Neutrons

An atom of iron has 30 neutrons. What is the mass number?

What is the Atomic Mass of Mercury?

• 80

• 121

• 200.59

• 280.59