Atomic Structure

The atomic number is ______________

and atomic mass is _____________.

• 1 and 1.0078

• .0078 and 1

• 1.0078 and 1

• 1 and .0078

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

Tags

NGSS.MS-PS1-1

Ions are: 

• atoms with a positive or negative charge
• atoms with no charge
• atoms with ONLY a positive charge
• atoms with ONLY a negative charge

When an atom loses an electron, it becomes a(n) _____________ ion.

• positive

• negative

• neutral

• polyatomic

When an atom gains an electron, it becomes a(n) _____________ ion.

• positive

• negative

• neutral

• polyatomic

What did JJ Thomson discover with his cathode ray tube experiment?

• electron

• proton

• neutron

• electron cloud

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

• Electron Shells
• Orbitals
• Electron Cloud
• Nucleus

Tags

NGSS.HS-PS1-8

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

Subatomic particles that are neutral in charge

• Neutrons
• Protons
• Nucleus 
• Electrons