Atomic Structure

The atomic number identifies the number of __________.

• electrons

• atoms

• protons

• neutrons

Subatomic particles that have a negative charge

• electrons

• protons

• quarks

• neutrons

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

These are found in the nucleus and have a neutral charge.

• proton

• electron

• neutron

Value representing the number of protons in an element

• Atomic Mass
• Mass Number
• Valence Electrons
• Atomic Number

Tags

NGSS.HS-PS1-7

Who was the first person to talk about atoms?

• Dalton
• Democritus
• Bohr
• Thomson

Who's experiments lead to the discovery of the nucleus and the mostly empty space around it?

• Democritus
• Dalton
• Thompson
• Rutherford 

What did JJ Thomson's work contribute to the atom? 

• Protons
• Neutrons
• Electrons
• Nucleus

Which was the last sub-atomic particle to be discovered?

• Proton
• Neutron
• Electron
• Nucleus

Which particles are located in the nucleus? 

• Protons & Electrons 
• Electrons & Neutrons 
• Protons & Neutrons