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J2_第3章(下)化学式

Authored by W.Y. Tan

Science

8th Grade

Used 18+ times

J2_第3章(下)化学式
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15 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

铝的化合价

+ 2

+ 3

- 2

- 3

+ 1

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

氢的化合价

+2

+3

+1

-2

-1

3.

FILL IN THE BLANKS QUESTION

30 sec • 1 pt

硫酸根的化合价

(a)  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

下列哪个是硝酸根离子?

NO3-

SO42-

OH-

CO32-

5.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

下列哪一个是酸(acid)?

HCl

H2O

H3PO4

NaOH

Na2SO4

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

下列哪个是铜的化学式?

Ca

Cu

Co

C

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

K+ 和OH-化合后的化学式是什么?

KOH

K(OH)2

K2OH

KOH2

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