
Understanding the Periodic Table and Isotopes

Interactive Video
•
Chemistry
•
9th - 10th Grade
•
Hard
Evelyn Hayes
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the atomic number of an element represent?
The number of neutrons in an atom
The number of protons in an atom
The total number of nucleons in an atom
The average mass of the element
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of the decimal places in the mass number on the periodic table?
They represent the number of electrons
They show the number of isotopes
They indicate the average atomic mass
They are a result of measurement errors
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why can't we simply average the coursework and final exam scores to get a student's final grade?
Because the coursework score is always lower
Because the final exam score is always higher
Because the scores are not percentages
Because the coursework and final exam have different weightings
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is an isotope?
An element with a different number of electrons
An element with a different number of protons
An element with a different atomic number
An element with a different number of neutrons
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the mass number of an isotope?
The average mass of the isotope
The number of protons in the isotope
The number of neutrons in the isotope
The total number of protons and neutrons in the isotope
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which isotope of magnesium is the most abundant in nature?
Magnesium-27
Magnesium-26
Magnesium-25
Magnesium-24
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the average atomic mass of an element calculated?
By using a weighted average of all naturally occurring isotopes
By taking the mass of the most abundant isotope
By adding the masses of all isotopes and dividing by the number of isotopes
By averaging the atomic numbers of all isotopes
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