Elements & the Periodic Table

What is the atomic number of the element in the picture?

• 39.0983
• 19

How many protons are in this element

• 39.0983
• 19
• 20

How many protons are in this element

• 39.0983
• 19
• 20

How many neutrons are in this element?

• 39.0983
• 19
• 20

What does the number 39.083 represent?

• Atomic Number
• Chemical Symbol
• Atomic Mass
• Number of electrons

What are the negatively charged particles in an atom?

• proton
• neutron
• electron

What are the positively charged particles in an atom?

• proton
• neutron
• electron

What  are the neutral particles in an element? 

• protons
• neutrons
• electrons

Which combination makes up the majority of the mass of an atom?

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

Who developed the periodic table we still use today? 

• JJ Thomas
• Ernest Rutherford
• Dimitri Mendeleev