2.Порівняйте положення в періодичній системі і будовою атома Калію і Натрію ,Магнію і Алюмінію, Флуору і Хлору, Сульфуру і Фосфору(попарно) і в зязку з цим їх властивості. .3.Обчисліть масову частку Гідрогену в його сполуці з найбільш активним неметалом

3 періоду

The diagram below shows a cell placed in a solution. a cell is shown placed inside a beaker. it is labeled cell. the solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution. only water is allowed to move in and out of the cell. what will most likely happen to the cell? it will expand as water moves out of it. it will shrink as water moves out of it. it will expand as water moves into it. it will shrink as water moves into it.

The number at the end of an isotope’s name is the number.

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.