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hoanglinhtk1991
2 năm trước
Câu 2: Cho Al, nguyên tử X thuộc cùng 1 chu kì với Al và đứng cách Al 4 nguyên tố. a) Xác định số hạt p, n, e và điện tích hạt nhân của nguyên tử Al. b) Xác định số hiệu nguyên tử và viết cấu hình electron của nguyên tử X. c) Hãy cho biết X là kim loại, phi kim hay khí hiếm? Vì sao?
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