Atoms and Periodic Table Quiz Review

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 

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

• negatrons 
• electrons 
• neutrons 
• protons 

The first energy level can hold up to how many electrons?

• 8
• 4
• 2
• 18

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

• 14
• 7
• 15
• 18

Most of the mass in an atom is concentrated in the...

• electrons
• nucleus
• protons
• empty space

How many neutrons are in the atom "K"?

• 7
• 19
• 39
• 20

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

What is the atomic number?

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

What's a valence electron?

• electrons in the second energy level
• electrons in the outermost energy level
• the atomic number
• electrons in the first level