Atomic Structure/ Periodic Table Quiz

How many electrons does this atom have?

• 2

• 4

• 6

• 10

Which subatomic particles contribute the most to the mass of an atom?

• Protons, Neutrons, Electrons
• Protons only
• Protons and Electrons
• Protons and Neutrons

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 

What number indicates the nucleus?

• 1
• 2
• 3
• 4

What number indicates an electron?

• 1
• 2
• 3
• 4

What is the Element's atomic number?

• Fe
• 26
• 55.847
• Iron

An atom has an atomic number of 19 and a mass number of 29. How many neutrons are in the atom?

• 30
• 19
• 10
• 38

Which part of an atom is used to identify it?

• number of protons

• number of neutrons

• number of electrons

How did Mendeleev arrange the elements?

• alphabetical 
• density
• melting point
• atomic mass