1. Which of the following species determine the chemical properties of an atom?
2. The negatively charged particles in an atom is the
3. How many orbitals are contained in an atom with atomic number 13?
4. Atoms are electrically neutral because they
5. The mass spectrometer can be used to measure mass of ?
6. The following gases are diatomic except
7. The instrument used to measure the accurate volume of solutions is
8. 1S² 2S² 2P⁶ 3S² 3P⁵ is the electronic configuration of
9. Polyatomicity is illustrated by molecules of
10. Changes in which no new substances are formed and reversible is known as
