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loveskincare91
2 năm trước
-Giúp mình với mình đang cần gấp Bài 3: Hãy so sánh xem: a/ Nguyên tử Đồng nặng hay nhẹ gấp mấy lần nguyên tử Lưu huỳnh b/ Nguyên tử Nhôm nặng hay nhẹ gấp mấy lần nguyên tử Bạc c/ Nguyên tử Nito nặng hay nhẹ gấp mấy lần nguyên tử Sắt d/ Nguyên tử Kẽm nặng hay nhẹ gấp mấy lần nguyên tử Bari Bài 4: Hãy xác định số nguyên tố, số nguyên tử sau: a) H2O; c) Al2O3; d) CaCO3 e) Al(OH)3;
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