An atom: A. Is the smallest whole unit of matter

B. Can form one or more elements

C. Is the smallest whole unit of matter with the properties of a specific element

D. All of the above

can form one or more elements

Explanation:

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The answer is A: Is the smallest whole unit of matter

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

c

explanation: