Предмет: Химия, автор: sanyaserov06

Сколько электронов не хватает до завершения внешнего энергетического уровня атомам элементов:

1. O —
;

2. Se —

Ответы

Автор ответа: Аноним
1

Ответ:

О-до завершения электронного уровня не хватает 2е-

Se-селен - 1

Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Английский язык, автор: Syuchaa
Помогите пожалуйста))
1 год назад
Предмет: Английский язык, автор: sooooon12345
Past Perfect Tense

 Complete the sentence with one verb from the
following list: stop, expect, work,
finish, write, see, do, build, know, be, receive. Be careful with
negatives. 



3. The workers
_________ painting the floor when I arrived.


6. They _________
a letter by the time their son was born.


7. He told them
he _________ at a plan before the army.


8. She _________
the letter by 5 o’clock and the manager was angry.




Future Perfect Tense

Complete
the sentence with one verb from the following list: translate, come, finish, see, cook, save, leave, lose, do, be married.
Be careful with negatives.


1.     I ________ reading this book by tomorrow evening.


2.     By next winter we _________ the necessary sum of
money.


3.     I _________ the article an hour before you come.


4.     On March 7 they _________ for twenty-five years.


5.     If I continue keeping to a diet I _________ 10 kilos
by the end of the month.


6.     The train _________ before we reach the station.


7.     I hope you __________ home from school by 2 o’clock.


8.     The mother __________ dinner by the time you come.


9.     The pupils have too many exercises. They _________ them by the time te teacher
returns.


10. Come to my place at 8 o’clock I _________ this film by
this time.

Герундій

Complete
these sentence with …ing forms. Use
the following verbs: come help, do,
swim, wait, ring up, waste, lend, buy, complain, be, write.


1.     She doesn’t like _________ money to friends.


2.     Would you mind come helping me to carry this heavy
bag?


3.     I’m really looking forward to __________ back.


4.     We went swiming yesterday because it was such a nice
warm day.


5.     It’s not worth _________ Jane after ten o’clock. She
has already fallen asleep.


6.     I haven’t finished writing my composition.


7.     I hate __________ for trams, I don’t like ___________
time.


8.     Instead of ___________ , what about __________
something useful about it!


9.     I can’t insist on __________ this book. It’s a bit too
expensive.


10. He apologized for ___________ late.

Past
Continuous Tense

Complete the sentences with one verb from the
following list: dance, learn, watch, do,
ski, wash up, cook, speak, make, discuss, lay, clean, work.


1.What _______ you _________ at 5 o’clock? – I _________
the room.


2.At that moment my teacher __________ over the telephone.


3.The mother asked her children not to make so much
noise as the father _________ in the study.


4.Yesterday we _________ in the forest the whole day.


5.When I came to the party all the guests ___________ .


6.What __________ you _________ at the meeting
yesterday?

7.While Jane __________ , Ann _________ sandwiches.


8.I __________ English grammar all day long yesterday.


9.While
my mother __________ dinner I __________ the table.      


10.My brother asked not to disturb him as he ___________
a war movie.
1 год назад
Предмет: Українська мова, автор: sabininaanna

скласти оповідання на тему їжачок хитрячок

 
1 год назад
Предмет: География, автор: Roza836
Определите давление атмосферы на вершине горы Говерла если давление у подножья 740 мм ртутного столба
8 лет назад
Предмет: Геометрия, автор: AlisaVilort
Даны векторы a(3;-2),b(4;2). Найдите координаты и модуль вектора: 2b+5a
8 лет назад