Across
- 4. a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well.
- 6. the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom
- 8. describes the angular momentum of an electron.
- 9. are distinct nuclear species of the same chemical element. They have the same atomic number and position in the periodic table, but differ in nucleon numbers
Down
- 1. electrons revolve around the nucleus in a specific circular path known as orbit
- 2. number the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
- 3. whose properties are intermediate between those of metals and solid nonmetals or semiconductors.
- 5. the total number of protons and neutrons in a nucleus.
- 7. a horizontal row of the periodic table