Chemistry Q2 Extra Credit

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

• nucleus 
• electron cloud
• core 
• center 

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

• 14

• 7

• 15

• 18

If an atom has 12 protons, which of the following must it also have to be considered a neutral atom?

• 12 neutrons

• 12 electrons

• 12 protons

• 24 protons and neutrons

If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?

• 10
• 20
• 30

What charge does an atom have when it GAINS electrons?

• Positive

• Negative

• Neutral

If the mass number of this chlorine atom is 36, how many neutrons does it have?

• 17

• 18

• 19

• can't be determined

What is the mass number of the atom shown here?

• 11

• 12

• 23

• Can't be determined

Two atoms of the same element but with different mass numbers are called________

• ions

• isotopes

• variables

Thomson experimented with ______

• gold foil

• alpha particles

• cathode rays

• magnets

James Chadwick discovered the ________.

• proton
• neutron
• electron
• nucleus