Предмет: Химия, автор: Анджелка47

Прошу мальчики срочно!!!
Определите тип кристаллических решеток в веществах: поваренная соль, алмаз, натрий, йодид калия, азот, водород, вода, кальций, оксид кальция.

Ответы

Автор ответа: fenec1

0

Поваренная соль(NaCl)-ионные решётки
Алмаз(С)-атомные решётки
Натрий(Na)-металлические решётки
Йодид калия(KI)-ионные решётки
Азот(N2)-молекулярные решётки
Водород(H2)-молекулярные решётки
Вода(H2O)-молекулярный решётки
Кальций(Ca)-металлические решётки
Оксид кальция(CaO)-ионные решётки

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: guskad8

Помогите пожалуйста отдаю всё
1. Read the text and say which sentences are true or false:

A story about a parrot

Once there lived a man who had a parrot. The man tried to teach the parrot to speak. But

the parrot could learn only the phrase, “There is no doubt about it.” (в этом нет

сомнения). The parrot always said these words and always gave the same answer.

“There is no doubt about it”.

At last the man decided to sell (продавать; sold) the parrot. He went to the street and

began to cry, “Twenty dollars for a very clever parrot!”

One woman heard this. She came up to the parrot and asked, “ Are you worth twenty

dollars?” The parrot answered, “There is no doubt about it”.

“What a clever parrot”, she said and bought the bird.

After some days the woman couldn’t listen to the parrot any more. She said, “What a fool

I was to buy this parrot and throw away so much money.Twenty dollars!”

Then the parrot cried, “There is no doubt about it”.

This time the parrot was right.

1. The parrot learned a lot of words.

2. The man liked his clever bird so much that he decided not to sell it.

3. The woman thought that the parrot was very clever.

4. The parrot said the same words.

5. The woman sold the parrot.

2. Complete the sentences with too, also, as well, either.

1. I don’t like snakes and I don’t like mice….. .

2. I can cook fairly well and my friend can ….. cook very well.

3. This music is very popular with teenagers ….. .

4. They are not students ….. .

5. Last year they travelled to the seaside …. .

3. Write –s where necessary.

1. 1. You can see hundred___ of beautiful horses in the Royal Mews. 2. Moscow is more than

eight hundred____ years old. 3. Last Sunday there were two thousand___ people in the

square. 4. Thousand___ of tourists come to Scotland every year. 5. More than ten million___

people live in Moscow.

4. Put the verbs in Present Simple, Past Simple or Future Simple.

1. Our teacher (to ask)______________________ us a lot of questions every lesson.

2. You (not to bring) __________________________ new books last week.

3. My brother (to fly)_________________________ to Berlin next autumn.

4. _____ you (speak)____________________ English well?

5. Linda (to visit) _____________________ Moscow 2 days ago.

5. Complete the sentences with the necessary words.*

Sand diary back beach resort

1. I always go to the ______________ in the morning.

2. Russian children go ____________ to school on the 1 st of September.

3. Den likes to play volleyball on the ______________.

4. Brighton is a famous _______________ in Great Britain.

5. My sister writes something in her ____________ every day.

6 лет назад

Предмет: Литература, автор: artemksenzik3

ПОМОГИТЕ СРОЧНО!!!!!!!!

6 лет назад

Предмет: Қазақ тiлi, автор: adilkhan85

2 сыныпка Китапхана туралы 3 сойлем жазып бериниздерши.

6 лет назад

Предмет: Химия, автор: Mmm00

Словосочетание, в котором говорится о химическом элементе:
1. жидкий азот
2. ржавое железо
3. горящий магний
4. атомарный кислород
5.ядовитый хлор

9 лет назад

Предмет: Физика, автор: anna1411196

Магнитный поток, пронизывающий контур проводника, равномерно уменьшился на 1,6 Вб. За какое время изменился магнитный поток, если при этом ЭДС индукции оказалась равной 3,2 В?

9 лет назад