Quiz on Atomic Mass Calculation

What is the atomic mass of an atom primarily determined by?

• The number of electrons
• The number of protons and neutrons
• The number of isotopes
• The number of chemical bonds

If an atom has 6 protons and 6 neutrons, what is its atomic mass?

• 6 amu
• 12 amu
• 18 amu
• 24 amu

Which of the following statements is true about atomic mass?

• It is always a whole number
• It can be a decimal
• It only includes protons
• It is the same for all elements

How do you calculate the mass number of an atom?

• Protons + Electrons
• Protons + Neutrons
• Neutrons - Electrons
• Electrons + Mass number

What is the mass of an electron compared to a proton?

• Equal
• Much heavier
• Much lighter
• Twice as heavy

If an atom has 8 protons and 10 neutrons, what is its mass number?

• 8
• 10
• 18
• 20

What is the atomic mass unit (amu) used for?

• Measuring temperature
• Measuring atomic mass
• Measuring volume
• Measuring energy

Why do isotopes of the same element have different atomic masses?

• They have different numbers of protons
• They have different numbers of neutrons
• They have different numbers of electrons
• They have different chemical properties

If the atomic mass of carbon is approximately 12.01 amu, what does this indicate?

• All carbon atoms have a mass of 12 amu
• Most carbon atoms have a mass close to 12 amu
• Carbon has no isotopes
• Carbon is the lightest element

What happens to the atomic mass of an element if it gains a neutron?

• It decreases
• It stays the same
• It increases
• It becomes unstable