kaylagoof4140
15.04.2021 •
Chemistry
8. Which of the following are the isotopes of the same element? SAA 19 cc 157 DD 56 BB
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Ответ:
An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.