Question

18.choose the correct option
atomic radius decreases in moving from left to right along a period
atomic radius increases in moving from left to right along a period
atomic radius decreases down the group
none of the above​

Answer 1

Explanation:

Events occurring before the invention of writing systems are considered prehistory. "History" is an umbrella term that relates to past events as well as the memory, discovery, collection, organization, presentation, and interpretation of information about these events. Historians place the past in context using historical sources such as written documents, oral accounts, ecological markers, and material objects including art and artifacts