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cuemnehihi
2 năm trước
Cho nguyên tố K (Z=19), Ca (Z=20), Al (Z=13), P (Z=15), S(Z=16), Br(Z=35), hãy nêu tính chất hóa học cơ bản của các nguyên tố đó theo các thông tin sau: - Là kim loại hay phi kim? - Hóa trị cao nhất với Oxi?, Hóa trị trong hợp chất với H? - Công thức oxit cao nhất? Công thức hiđroxit? Chúng có tính axit hay bazơ? - Công thức hợp chất với H, chúng tồn tại ở trạng thái gì? ( rắn, lỏng hay khí).
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