Science 8 review

He hypothesized that an atom is a solid sphere that could not be divided into smaller particles by any method of chemical analysis

• Joseph John Thomson

• John Dalton

• Neils Bohr

• Ernest Rutherford

He reasoned that the electric current was made of small particles called corpuscles using cathode ray tube.

• Joseph John Thomson

• Werner Heisenberg

• Ernest Rutherford

• Neils Bohr

He came up with nuclear model of an atom and discovered proton

• JJ Thomson

• Werner Heisenberg

• Ernest Rutherford

• Neils 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 is the atomic number for an element with three protons?

• 2
• 1
• 3
• 6