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Loan123456
2 năm trước
BÀI 4 : SO SÁNH SỰ NẶNG NHẸ GIỮA : a) nguyên tử nitơ và nguyên tử cacbon b) nguyên tử natri và nguyên tử canxi. Bài 5 : so sánh nguyên tử lưu huỳnh nặng hơn hay nhẹ hơn bao nhiêu lần so với nguyên tử Oxi, nguyên tử hiđro, nguyên tử Cacbon. Bài 6 : hãy so sánh : a) nguyên tử Nitơ nặng hơn hay nhẹ hơn nguyên tử Cacbon bao nhiêu lần. b) nguyên tử Natri nặng hơn hay nhẹ hơn nguyên tử canxi bao nhiêu lần. c) 2 nguyên tử sắt nặng hay nhẹ hơn 3 nguyên tử natri bao nhiêu lần. d) 4 nguyên tử Oxi nặng hay nhẹ hơn 1 nguyên tử đồng bao nhiêu lần giúp mk vs lm từng bài nhé
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