Question

Based on the information in the table, which two elements are most likely in the same group, and why?

bismuth and thallium, because their atomic masses are very similar
nitrogen and oxygen, because they were both first isolated in the same year
sodium and thallium, because their names both end in the same suffix: -ium
bismuth and nitrogen, because they have the same number of valence electrons

Answer 1

D. bismuth and nitrogen, because they have the same number of valence electrons

Step-by-step explanation:

Answer 2

D

Step-by-step explanation:

because they have the same number of valence electrons