写出下列化学符号或符号的意义: (1)2个氮原子______; (2)2个氢分子
题型:填空题
问题:
写出下列化学符号或符号的意义:
(1)2个氮原子______;
(2)2个氢分子______;
(3)6个水分子______;
(4)铝元素______;
(5)氯化钠______;
(6)氢氧化钠______;
(7)2个氯离子______;
(8)+3的铁元素______;
(9)H______;
(10)2CO2______
(11)CuO______;
(12)Na+______;
(13)
O______.+2 Mg