Предмет: Химия, автор: Аноним

Помогите пожалуйста а то я уже сижу 1 час и не могу зделать

Приложения:

Ответы

Автор ответа: thegreatunknown

Ответ:

1. P (31)

2. Na (23)

3. O (16)

4. B (11)

Автор ответа: vitvitskay1975

Ответ:

1. Р (31)

2. Na (23)

3. O (16)

4. B (11)

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