Предмет: Химия, автор: vekylecha

Напишіть електронну та графічну електронну формули Карбону. Вкажіть його можливі валентності. ​

Ответы

Автор ответа: Elizabeth1188
1

Графічна формула на фото.

Електронна формула: 1S22S22p2

Можливі валентності: 4 (ІV) в усіх органічних сполуках, 1 (I) при взаємодії з гідрогеном (Н), 2 (II) при взаємодії з Оксигеном (О)

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Решить тест:
1..... my parents live in Australia.

A Neither B Both C Any D None

2 There aren’t .... cars in the car park today.

A much B some C many D none

3 Sorry, we have .... fresh eggs.

A no B none C any D nothing

4 Sorry, I .... here on Monday. I have to go to the

dentist.

A is B ‘m C ‘ll be D won’t be

5 I .... 40 years old in 2030.

A is B am C will be D am being

6 I .... them since they went to Norway.

A haven’t seen B didn’t see C wasn’t seen

D won’t see

7 I haven’t eaten any meat .... I became a vegetarian.

A since B after C until D before

8 How are you? I haven’t seen you .... a long time?

A since B after C before D for

9 Who .... the housework in your house?

A makes B does C has D gets

10 If I lost my wallet, I.... the police.

A phone B ‘m phone C ’ll phone D ’d phone

11 Would you go to the moon if you .... the chance?

A have B had C has D will have

12 If I didn’t like flying, I .... be a pilot.

A won’t B haven’t C didn’t D wouldn’t

13 If she .... recharge her battery, she won’t be able to

use her CD player.

A doesn’t B isn’t C hasn’t D wasn’t

14 I .... to your party, if you don’t want me to come.

A ’ll come B ’m coming C won’t come

D don’t come

15 Who .... you talk to, when you have a problem?

A did B do C does D will do

16 Excuse me? Can I buy .... fresh eggs please?

A a few B less C a bit D a little

17 Have you .... finished your homework?

A complete B completed C full D completely

18 Are you three girls .... in the back of the car?

A comfort B comfortable C comforted

D comforting

19 The play was very long and we were very .... .

A bored B boring C bore D boredom

20 Josef Stalin .... in this house when he was a child.

A had lived B used to live C would live D lives

21 Jack .... blue jeans when I saw him.

A wore B was wearing C has worn D wears

22 They arrived after the film .... .

A finished B had finished C was finished

D finish

23 She can’t swim in the race because she .... her arm.

A broke B has broken C breaks D is breaking

24 I .... Russian because I lived in Moscow for ten

years.

A understand B ’m understanding

C to understand D ‘ll understand

25 Sigmund Freud .... in Austria.

A was born B is born C born D to be born

26 .... anything about astronomy?

A Do you know B Are you know

C Have you know D Do you knowing

27 They told me .... .

A to relax B relaxing C relax D relaxed

28 My parents told me .... worry about my school work.

A not to B not C don’t D don’t to

29 This is the diamond .... was stolen in 2005.
A what B who C where D which

30 Bono comes from Ireland, .... he?

A isn’t B doesn’t C hasn’t D didn’t

31 Don’t start cooking the rice until I .... you.

A will phone B ’m phoning C phoned D phone

32 I’ll come and see you after I .... my supper.

A finished B will finish C have finished D finishes

33 What time did you .... go to sleep when you were

twelve years old?

A must B should C have to D ought to

34 How .... have you had this coat?

A much B far C long D time

35 The race .... by Ken Good in 42.9 seconds.

A was won B has won C is won D had won
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