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Average Atomic Mass

Authored by Wayground Content

Science

10th Grade

Used 70+ times

Average Atomic Mass
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16 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the formula for calculating average atomic mass?

Average Atomic Mass = (mass1 * abundance1) + (mass2 * abundance2) + ...

Average Atomic Mass = (mass1 + mass2) / 2

Average Atomic Mass = mass1 + mass2 + mass3

Average Atomic Mass = (mass1 * mass2) / (abundance1 + abundance2)

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is average atomic mass?

The total mass of an element's isotopes combined.

The weighted average of the masses of an element's isotopes, taking into account their relative abundances.

The mass of the most abundant isotope of an element.

The average mass of all atoms in a molecule.

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the significance of protons in determining an element's identity?

They determine the element's atomic mass.

They define the element and its position on the periodic table.

They influence the element's reactivity with other elements.

They are responsible for the element's color.

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the relationship between isotopes and average atomic mass?

Average atomic mass is the sum of all isotopes' masses.

Average atomic mass reflects the weighted contributions of all isotopes of an element.

Isotopes have no effect on average atomic mass.

Average atomic mass is the mass of the most abundant isotope.

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Why can't the average atomic mass be determined from certain data?

If the relative abundances or masses of isotopes are not provided, the average cannot be calculated.

The average atomic mass is always a whole number.

The atomic mass is only determined by the most abundant isotope.

Average atomic mass can be calculated using only the mass of the heaviest isotope.

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the role of relative abundance in calculating average atomic mass?

It determines the total number of protons in an atom.

It indicates how common each isotope is, affecting the average mass calculation.

It measures the energy levels of electrons in an atom.

It represents the mass of the most abundant isotope only.

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the average atomic mass of an element with isotopes of 75.23 amu (24.1%), 74.61 amu (48.7%), and 75.20 amu (27.2%)?

75.00 amu

75.23 amu

74.85 amu

75.12 amu

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