Atom Structure and Discovery

Who is responsible for the discovery of the atomic nucleus?

• Thomson
• Democritus
• Rutherford
• Bohr

all matter is made of what 

• energy 
• atoms 
• electrons 
• compounds 

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

the central region of an atom where its neutrons and protons are is its 

• nucleus 
• electron cloud
• core 
• center 

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 

True or False? Neutrons have a negative charge

• True
• False

What does the 1.00794 stand for?

• Hydrogen
• atomic number
• atomic mass
• atomic explosion

What is the atomic number for an element with three protons?

• 2
• 1
• 3
• 6

What is the atomic mass of "F"

• 9
• 18
• 17
• 19

Tags

NGSS.MS-PS1-1