Nguyên Tử K (Z=19) Có Số Lớp Electron Là: | Cungthi.online

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Câu hỏi

Nguyên tử K (Z=19) có số lớp electron là:        

A.

3.

B.

2.

C.

1.

D.

4.

Đáp án và lời giải Đáp án:D Lời giải:

Cấu hình electron của K: 1s22s22p63s23p64s1

Vậy đáp án đúng là D.

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