Atoms Review

What did Democritus, Dalton, Thomson, Rutherford, and Bohr all have in common?

• They were all cool dudes.
• They each identified new isotopes of atoms.
• They each contributed to the development of the atomic theory.
• They each designed a new building.

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

an atom with atomic number 6 would have how many protons 

• 6
• 12
• 3
• cannot be determined 

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

What is the mass number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

The particles that are found in the nucleus of an atom are

• neutrons and electrons
• electrons only
• protons and neutrons
• protons and electrons

What does the 1.00794 stand for?

• Hydrogen
• atomic number
• atomic mass
• atomic explosion

Which of these is found in the cloud surrounding nucleus?

• proton

• neutron

• electron

• protons and neutrons

Tags

NGSS.MS-PS1-1

Which of these has the least mass at almost 0 amu?

• proton

• neutron

• electron

• protons and neutrons

 An atom is neutral if...    

• The number of protons = electrons
• The number of neutrons = protons
• The number of protons∠ electrons
•  Electrons+Neutrons = 0