Examine the elements listed below.

Question

nitrogen (N), phosphorus (P), arsenic (As)
Which of the answer choices accurately describes a common property of these elements?
they have the same amount of atomic mass

they have the same amount of reactivity

they have the same number of valance electrons

they have the same atomic radius size

please help

Answer 1

I don't understand your problem with this. The process of elimination should give you the answer.
a. Look on the periodic table and find the atomic mass. Are they the same?
b. Does the reactivity change as you down or up the table?
c. Do elements in the same column have the same number of valence electrons?
d. Don't elements change their size as one goes up or down the table?

Answer 2

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