Предмет: Химия, автор: rasull150408

Задание 5. Опишите состав атома элемента с порядковым номером 19
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Автор ответа: dindon4532

химический знак K(калий) заряд +19 ,19 протонов,19электронов,20 неитронов

на внешнем уровне 1 электрон,номер периода 4 и это значит что у этого элемента 4 энергетических уровня, номер группы 1 и подгруппа главная,электронная формула:1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹

rasull150408: спс

dindon4532: угу

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