Question

Which sequence of atomic numbers represents elements that have similar chemical properties?
A. 3, 12, 21, 40
B. 4, 20, 38, 88
C. 9, 16, 33, 50
D. 19, 23, 30, 36

Answer 1

Given what we know about elements of the periodic table and their properties, we can confirm that the list with elements that have very similar properties is option B.

How do we know that option B list elements with similar properties?

• The periodic table has a very specific organization.
• One of the many ways in which it is organized is by groups.
• It is often divided into 9 groups, usually color-coded.
• The elements that are in the same group all share similar properties.
• Option B lists 4 elements of the Alkaline-earth metals group.

Therefore, we can confirm that since option B is the choice that lists all elements pertaining to the same group, in this case, the Alkaline-earth metals, it is the correct option as they will all have very similar properties.

To learn more about the periodic table visit:

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