Предмет: Химия, автор: dianapolegaeva2005

количество протонов,электронов и нейтронов
(O),(Li),(N),(Hg)

Ответы

Автор ответа: prosvirinandrew2004

1

O: e = 8, p=8, n= 16-8=8

Li: e = 3, p=3, n= 7-3=4

N: e = 7, p=7, n = 14-7=7

Hg: e= 80,p=80,n= 200-80= 120

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Математика, автор: Аноним

Познач площу прямокутника зі сторонами 29 см і 15 см.

3 года назад

Предмет: Английский язык, автор: na1veee2008

Which is right?

1 Most of my friends are students/ some students. (students is correct) 2 Are you careful driver / a careful driver?

3 I went to the library and borrowed books / some books.

4 Mark works in a bookshop. He sells books / some books.

5 I've been walking for hours. I've got sore feet/some sore feet.

6 I don't feel very well. I've got sore throat / a sore throat. 7 What lovely present / a lovely present! Thank you very much.

8 I met students/ some students in a cafe yesterday. They were from China.

9 It might rain. Don't go out without umbrella/without an umbrella. 10 People/Some people learn languages more easily than others.

1.4 Put in a/an or some where necessary. If no word is necessary, leave the space empty.

1 I've seen some good movies recently.

2 Are you feeling all right? Do you have a headache?

3 I know lots of people. Most of them are. students. 4 When I was child, used to be very shy.

5

birds, for example the penguin, cannot fly.

6 Would you like to be. ............actor?

7 Questions, questions, questions! You're always asking. questions!

8 I didn't expect to see you. What surprise!

9 Do you like staying in 10 Tomorrow is a holiday. hotels? shops will be open, but most of them will be closed.

11 Those are nice shoes. Where did you get them?

12 You need visa to visit countries, but not all of them.

13 Kate is teacher. Her parents were teachers too.

14 I don't believe him. He's................. liar. He's always telling lies.

3 года назад

Предмет: Русский язык, автор: thedembergow88q8

Выпишите номера предложений с нарушениями норм грамматики.
1) В рассказах и пьесах Максима Горького описывается о жизни обыкновенных людей.
2) Древние греки были более образованнее, чем римляне.
3) Мы поговорили и с тем, и с другим, обои согласились с моим предложением.
4) Совершили ошибку, я поспешил её исправить.

3 года назад

Предмет: Литература, автор: Аноним

Любимый отрывок из повести Ночь перед Рождеством.

9 лет назад

Предмет: Литература, автор: oksanabay

Какой совет дал царю продавец разума ? Кто ответит 10баллов

9 лет назад