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InterviewSolution
| 1. |
1. Describe the composition of an atom.2. Write any three characteristics of an atom.3. Write the characteristics of a molecule. |
| Answer» <p>1. The atom consists of a tiny nucleus surrounded by moving electrons. The nucleus contains protons, which have a positive charge equal in magnitude to the electron's negative charge. The nucleus also contains neutrons, which have virtually the same mass but no charge.</p> <p>2. An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element. It is composed of protons, which have a positive charge, and neutrons, which have no charge. Protons, neutrons, and the electrons surrounding them are long-lived particles present in all ordinary, naturally occurring atoms.</p> <p>3. A molecule is an electrically neutral group of two or more atoms held together by chemical bonds.</p> | |