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Question 3 (1 point) Fill in the blanks: potassium is one of the most well-known elements in the alkali metal It is in the which makes it a element. Its single valence electron is in the subshell of the shell, making it very reactive. It reacts readily with non-metals to form O a series, s block; common; i = 2; n = 4; networks Ob row, d block; main groupI = 1;n=4; salts family: block; main group, I = 0;n=4; salts Od row,d block; non-metal; = 1; n = 3; alloys 5 с