Предмет: Химия, автор: janovica5

Какова масса протона?
б) 2,5 б) 1,00 c) 0
2. Каков полный заряд электронов калия?
а) 19 в) 20 3 б) 39
3. Каково число протонов у углерода?
б) 6 а) 12 в) 24
4. Каково число нейтронов у азота?
а) 7 б) 14 в) 28
5. Элементарная частица в атоме - электронное обозначение:
а) е б) а c)v
6. Сколько протонов содержится в ядре атома с атомным номером 13?
а) 27 б) 13 в) 14
7. Определите число электронов у бериллия?
а) 4 б) 5 в) 9
8 . Из каких частиц состоят вещества?
а) Из атомов и молекул
б) Из ионов в) Из атомов, молекул и ионов
9. Опишите химический элемент -S по заданному плану! а) название химического элемента. б) Произношение химического элемента (в) относительная атомная масса химического элемента. (г) атомный номер химического элемента. (д) ядерный заряд (k) количество электронов 1) количество протонов (м) количество нейтронов

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Автор ответа: xudayqulovaelmira

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