Прочитайте текст и определите какой из заголовков соответствует тексту An atom a basic unit of matte...: ответ на тест 782659 - Английский язык

Прочитайте текст и определите, какой из заголовков соответствует тексту
An atom, a basic unit of matter, is a packet of energy with electric charges. Except for hydrogen, which has no neutrons, atoms are composed of a nucleus with neutrons and protons and a cloud with electrons orbiting the nucleus. The protons have a positive (+) charge. The electrons have a negative (−) charge. The neutrons have no charge. Opposite charges attract and like charges repel.