Задание
Выбери электронную схему галогена:
- \(\underbrace{)}_{2} \,\underbrace{)}_{8} \,\underbrace{)}_{18} \,\underbrace{)}_{5}\)
- \(\underbrace{)}_{2} \,\underbrace{)}_{5}\)
- \(\underbrace{)}_{2} \,\underbrace{)}_{8} \,\underbrace{)}_{9} \,\underbrace{)}_{2}\)
- \(\underbrace{)}_{2} \,\underbrace{)}_{8} \,\underbrace{)}_{18} \,\underbrace{)}_{18} \,\underbrace{)}_{7}\)