OL Atomic Theory Review 2021

How do you find the mass number?

• Protons+Electrons

• Protons+Neutrons

• Protons+Neutrons+Electrons

• Calculate it using the percent abundance for each isotope

How do you find the average atomic mass?

• Protons+Electrons

• Protons+Neutrons

• Protons+Neutrons+Electrons

• Calculate it using the percent abundance for each isotope

How does Carbon-12 and Carbon-14 differ?

• # of protons

• Mass #

• # of neutrons

• Mass # and # of neutrons

Tags

NGSS.HS-PS1-8

Carbon-12 and Carbon-14 are

• Ions

• Isotopes

• Cations

• Anions

Tags

NGSS.HS-PS1-8

If carbon has an average atomic mass of 12.011 amu, which isotope is the most abundant?

• C-14

• C-12

• C-16

• They are equal

Which is true of a cation (select all that apply)?

• A positively charged ion

• Formed by gaining protons

• Formed by losing electrons

• Formed by gaining electrons

If aluminum loses 3 electrons, what will the charge be?

• +

• -

• +3

• -3

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following is an ion?

• O-16

• O-18

• Carbon-12

• O^-2

An atom with 3 protons, 2 electrons, and 4 neutrons will be:

• Lithium-7 with a -1 charge

• Lithium-5 with no charge

• Lithium-5 with a +1 charge

• Lithium-7 with a +1 charge

Tags

NGSS.MS-PS1-1

How many neutrons does Thorium-182 have?

• 92

• 90

• 182

• 129

Tags

NGSS.HS-PS1-8