Question

please answer all this mains​

Answer 1

C.

1.False. (Correction: Tungsten is used)

2.False. (Correction: A piece of iron only rusts in moist air.)

3.True.

4.False. (Correction: Nitrogen is used.)

5.I don't know the answer for this question. Iirc, diamond can be used for this purpose, but uranium is commonly taken into consideration.

D.

1-e

2-c

3-d

4-b

5-a

E.

1. Non-metals , Metals

2.Bromine

3.Radon. (Astatine, though in the same group, is not considered as a noble gas as the tests for its chemical properties are still in lab.)

4.Antimony

5.Metals, Non-metals.

Answer 2

Answer:

C

1.False(correction-Tungsten is used)

2.False(correction-iron only rusts in moist air)

3.True

4.False(correction-nitrogen is used)

5.sorry, I don't know the answer.

D

1.e.

2.c.

3.d.

4.b.

5.a.

E

1. Non-metals, metals.

2.Bromine.

3.Radon.

4. Antimony.

5.Metals, Non-metals.