Subatomic Particles- Amus, Isotopes, Mass Numbers

How is average atomic mass determined?

• By adding all of the protons and neutrons together.

• By summing the masses of the element's isotopes, each multiplied by its natural abundance on Earth

• By multiplying how often protons and neutrons occur and adding up the averages

What does AMU stand for?

• Atomic mass university

• Atomic mass unit

• Atoms mean unity

• All mass united

What are AMUs?

• The unit used to measure the mass of atoms and molecules. Equal to 1/12 the mass of Carbon-12.

• Unit to measure the radius of an atom

• Equal to 1 gram

• The unit used to measure larger quantities of atoms

What does the mass number represent?

• The average of an atom's mass as it correlates to its isotopes and their abundances

• The number of protons and neutrons together for a specific isotope of an atom

• The number of protons in an atom

• The number of electrons in an atom

If an atom has 5 protons and 6 neutrons, what is the proper name of the isotope?

• Boron-11

• Carbon-11

Tags

NGSS.HS-PS1-8

How many neutrons does the atom in the picture have?

• 48

• 22

• 26

• -26

Tags

NGSS.HS-PS1-8

What is the total number of particles in the nucleus of the atom pictured?

• 22

• 70

• 48

• Need more information to answer

Tags

NGSS.HS-PS1-8

The atomic number of the pictured atom is

• 29

• 63

• 92

• 0

Tags

NGSS.HS-PS1-1

The mass number of the pictured element is

• 63

• 29

• 92

• 0

Tags

NGSS.HS-PS1-8

carbon-12 and carbon-13 are _ of each other.

• ions

• isotopes

• cations

• anions

Tags

NGSS.HS-PS1-8