Isotope and Ion Review Quiz

Which of these best describes why some atomic masses are not whole numbers?

• The extra mass comes from the electrons

• Pieces of protons and neutrons can stick in the nucleus throwing off the numbers

• Neutrons are slightly bigger than protons causing the numbers to be slightly off

• Atomic mass is the average of all the isotopes

Chlorine has two isotopes- Chlorine-35 and chlorine-36. With an atomic mass of roughly 35.5, what can you tell me about these isotopes?

• There is significantly more Chlorine-36 naturally

• They exist in roughly equal amounts in nature

• There is significantly more Chlorine-35 naturally

• There must be a third isotope, Chlorine-34, that exists in the highest quantity

What is the charge of an atom containing: 4 protons, 5 neutrons , and 4 electrons?

• 1-

• 0

• 1+

• 9

What is the charge of an atom containing: 1 protons, 1 neutron, and 2 electrons?

• 2

• 3

• 0

• 1-

What is the charge of an atom containing: 5 protons, 7 neutrons, and 7 electrons?

• 2-

• 12

• 0

• 2+

What is the mass of an atom containing: 5 protons, 7 neutrons, and 7 electrons?

• 2

• 12

• 0

• 2-

Tags

NGSS.MS-PS1-1

If an atom has 4 protons, a mass of 12, and charge of +2, how many electrons does it have?

• 6

• 4

• 8

• 2

Tags

NGSS.MS-PS1-1

If an atom has 4 protons, a mass of 12, and charge of +2, how many neutrons does it have?

• 6

• 8

• 4

• 2

Tags

NGSS.MS-PS1-1

If an atom has 8 protons, a mass of 21 AMU's, and a charge of -1, how many neutrons does it have?

• 8

• 9

• 13

• 7

Tags

NGSS.MS-PS1-1

If an atom has 8 protons, a mass of 21 AMU's, and a charge of -1, how many electrons does it have?

• 8

• 9

• 13

• 7

Tags

NGSS.MS-PS1-1