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Що є спільного у будові атомів елементів з порядковими номерами 6 і 9:
а) заряд ядра;
б) кількість електронів;
в) кількість енергетичних рівнів;
г) кількість електронів на зовнішньому енергетичному рівнi-
Предмет:
Химия -
Автор:
marcellak0or - 5 лет назад
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Ответы 1
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Цi елементи знаходяться у другому перiодi, але в рiзних групах, тому спiльного у будові атомів елементів з порядковими номерами 6 і 9в) кількість енергетичних рівнів
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Автор:
odiehendricks - 1 год назад
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Раскройте скобки, употребляя глаголы в нужной форме.
1. Cora (to want) to have a dog. She says "If I (to have) a dog, I (to have) a friend". When she (to come) from school in the afternoon, she (to decide) to ask her mother to let her to have a dog.
2. He (not to sleep) that night. He (to think) till the morning: his head (to be) full of thoughts. When the morning (to come) he (to take) decision at last.
3. After we (to say) good-bye to the old man we (to go) out of the house. It (not to be) anybody in the street. The sun (to shine) brightly in the sky.
4. "I (to clean) my room and (to put) everything in its place", she said. "You see, now I (to go) away".
5. When I (to look) at my friend, I (to see) that he (to smile) from ear to ear. He (to read) a funny story.
6. My parents (to look) at me as I (to come) in. "Where you (to be)?" exclaimed my mother. "We (to wait) for you since five o'clock". She (to be) very angry with me.
7. It (to be) a nice party last night. Everybody (to dance) and (to be) happy. My friend (to bring) great music.
8. If he (not to have) the money tomorrow, they (to give) this puppy to another boy and he never (to see) him again.
9. Last night John (to be) at his sports club. He (to think) he (to recognize) a girl who (to come) into the gym. "I (to think) I (to see) you somewhere before," he said.
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