Предмет: Химия, автор: moonchildfem

УЖАСНО ПРОШУ ПОМОЧЬ!!
Пользуясь законами сохранения зарядового и массового чисел, определи заряд и массу ядра, получившегося в результате α-распада.

Найди этот элемент в таблице Д. И. Менделеева. Запиши химический знак элемента латинскими буквами.

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Автор ответа: UFO006

1

отметь, пожалуйста, как лучший

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