“Ca” 这个符号表示什么意思?(多选题)

2.2 元素符号测验

Quiz
•
Chemistry
•
7th Grade
•
Hard
HEE JUIN
Used 4+ times
FREE Resource
12 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
45 sec • 3 pts
钙元素
一个钙原子
金属钙
一个钙元素
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
“5Cl” 这个元素符号表示了什么?
氯元素
5个氯元素
5个氯分子
5个氯原子
3.
MULTIPLE SELECT QUESTION
45 sec • 2 pts
关于 “4H2” 中,以下哪个说法是正确的?(多选题)
共有4个氢原子
4个氢分子
1个氢分子有2个氢原子
2个氢分子有4个氢原子
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
带3个单位负电荷的氮离子的符号是____。
Ne3-
N3-
N-3
Ne-3
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
带两个单位正电荷的镁离子的符号是____。
Me2+
Me+2
Mg2+
Mg+2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
氢氧根离子的符号是____。
OH-
OH2-
HO2+
OH3+
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
硫酸根离子的符号是____。
SO23-
SO42-
So23-
So42-
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