Using calcium’s atomic structure, as shown in the image, what is this element’s atomic number? Atomic Structure of Calcium

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Using calcium’s atomic structure, as shown in the image, what is this element’s atomic number?
Atomic Structure of Calcium

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Hồng Cúc 3 years 2021-09-04T11:48:04+00:00 1 Answers 2 views 0

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    2021-09-04T11:49:13+00:00

    Answer:

    Atomic number of calcium is 20.

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )