Isotopes and Average Atomic Mass

How many neutrons in C-14?

• 6
• 7
• 14
• 8

Tags

NGSS.MS-PS1-1

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

Tags

NGSS.MS-PS1-1

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

Tags

NGSS.MS-PS1-1

How many neutrons does uranium-235 have?

• 238
• 92
• 146
• 143

Tags

NGSS.MS-PS1-1

What do these isotopes of carbon all have in common?

• neutrons & mass number
• atomic number and neutrons
• atomic number and electrons
• protons, atomic number, and mass number

Tags

NGSS.MS-PS1-1

In a correctly written symbol what would be located in the "A" position?

• number of neutrons
• atomic number
• number of electrons 
• mass number

Tags

NGSS.MS-PS1-1

What quantities vary between isotopes of an element?

• protons, electrons, and atomic mass
• protons, electrons, and atomic number
• neutrons and electrons
• neutrons and atomic mass

Tags

NGSS.HS-PS1-8

which atom has  4 neutrons?

• Li-6
• Li-7
• Li-8
• they have the same # of neutrons

Tags

NGSS.MS-PS1-1

which explanation of this notation is correct?

•  12 is proton #
• 6 tells you there are 6 neutrons
• 6 tells you there are 6 protons
• 12 is not a mass # here

Tags

NGSS.MS-PS1-1

Magnesium exists as three isotopes shown above. What is the average atomic mass?

• 18.39 amu

• 20.74 amu

• 22.56 amu

• 24.31 amu

Tags

NGSS.MS-PS1-1