Предмет: Химия, автор: Kiome1548

Как определять валентность??? СРОЧНО, ПЖ

Ответы

Автор ответа: Funtik1115

Ответ:

при помощи таблицы менделеева

Объяснение:

смотри почти все валентности можно найти взяв номер столбца который пищется сверху и отнять его от самого большого номера в этом столбце а вообще их надо просто тупо вызубрить

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Математика, автор: tkocerova54

498 После аварии в колесе велосипеда у Миши не хватает 4% спиц. В магазине он купил недостающие спицы плюс одну запасную. Сколько спиц в колесе, если Миша купил 3 спицы?

5 лет назад

Предмет: Английский язык, автор: AndreyZhilchov

ПОМОГИТЕ УЛЬТРА СРОЧНО

Read the text 'School in the Past and in the Future'. Then match the beginnings of the sentences from the text with their endings. There are two extra endings.

Открыть текст в отдельной вкладке

School in the Past and in the Future

In Britain in the early and mid-nineteenth century, children didn't have to go to school at all. There were schools, of course, but you had to pay to go to them, and often parents couldn't afford the fees. Many people also believed that girls didn't need to go to school, as their future was to get married and have children. Although from 1870 the law said that all children aged 5 to 10 had to go to school, many poor families weren't able to pay. The children of these families needed to have a job in order to pay the fees, and school timetables were organised to make this possible. It wasn't until 1918 that children had to be at least 12 years old to work for a living.
Schools 100 years ago were certainly very different from those today. But what about the future? A national newspaper recently organised a competition for schools called The school I'd like. 'I'm concerned that the pressures of the national curriculum will mean that there won't be time for a project like this,' a reporter said. She needn't have worried, as there were over 15,000 entries full of ideas!
And what great ideas: a school in a giant submarine with waterproof maps of the underwater world, private helicopters to fly students to France for French lessons, and rockets to take children to distant planets to study the solar system. There are also some down-to-earth suggestions: clean toilets with locks that work so that students won't have to wait until they get home, no uniforms so that students will be able to choose what to wear, chill-out rooms to relax in, and enough computers so that students won't need to queue for them. Safety and comfort are clearly important: one student suggests an anti-bullying alarm, and another writes 'We don't want interactive whiteboards, we want comfortable chairs!'

Выберите нужную позицию в левом поле, кликнув по ней, затем кликните в правом поле по выбранной вами позиции (протянется линия). Если хотите изменить ответ, нажмите на точку в любом из полей (линия исчезнет, и вы сможете провести новую).

Варианты:
After 1918 if you wanted to work you

In the nineteenth century parents often

A hundred years ago many people thought that girls

In Britain until 1870 children

Children of poor families needed to work so that they

There were 15,000 entries for competition so the reporter

One idea is for schools to have rockets so that students

Another idea is a school without uniforms where students

More computers are recommended so that students

An anti-bullying alarm is also suggested so that students and teachers

needn't have gone to school until they were ten years old.

won't all have to wear the same clothes.

were able to pay school fees.

didn't have to go to school.

will be able to study the stars and planets.

had to be twelve years old.

won't need to wait to use one.

will need to study more and more subjects.

needn't have worried.

will be able to take action before it starts.

weren’t able to pay school fees.

didn’t need to be educated.

5 лет назад

Предмет: Геометрия, автор: irkamazanuk

Як різні організми пристосувалися до жиитя у водному середовищі
Риби
Теплокровні водоплавні тварини Водоплавні птахи
Водоплавні комахи
Водяні рослини

Как определять валентность??? СРОЧНО, ПЖ ​

Ответы

Как определять валентность??? СРОЧНО, ПЖ