Unit 2: The Periodic Table and Isotopes (CFA)
Authored by Patrick King
Science
10th Grade
DOK Level 3: Strategic Thinking covered
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25 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Both isotopes have the same atomic mass.
Both isotopes have the same number of neutrons.
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DOK Level 3: Strategic Thinking
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following best explains why elements in the same group of the periodic table have similar chemical properties?
They have the same number of protons.
They have the same number of valence electrons.
They have the same atomic mass.
They have the same number of neutrons.
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DOK Level 3: Strategic Thinking
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
35.5 amu
36.0 amu
35.0 amu
37.0 amu
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DOK Level 3: Strategic Thinking
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following groups in the periodic table is known for having elements that are highly reactive nonmetals?
Group 1: Alkali Metals
Group 2: Alkaline Earth Metals
Group 17: Halogens
Group 18: Noble Gases
Tags
DOK Level 3: Strategic Thinking
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain why the atomic mass of an element on the periodic table is not a whole number.
It is the average of the masses of its isotopes, weighted by their natural abundance.
It is the sum of protons and electrons.
It is the sum of protons and neutrons.
It is the average of the masses of its isotopes, without considering their abundance.
Tags
DOK Level 3: Strategic Thinking
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the number of valence electrons affect the chemical reactivity of elements in Group 1 compared to Group 17?
Group 1 elements are less reactive because they have more valence electrons.
Group 17 elements are less reactive because they have fewer valence electrons.
Group 1 elements are more reactive because they have fewer valence electrons.
Group 17 elements are more reactive because they have more valence electrons.
Tags
DOK Level 3: Strategic Thinking
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following statements best describes the trend in atomic radius across a period in the periodic table?
Atomic radius increases from left to right.
Atomic radius decreases from left to right.
Atomic radius remains constant across a period.
Atomic radius first increases, then decreases across a period.
Tags
DOK Level 3: Strategic Thinking
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