1. Which of the following species determines the chemical properties of an atom?
A. Electron
B. Neutron
C. Nucleus
D. Proton
2. The following glasswares are used to measure the volume of liquids except
A. graduated beaker
B. pipette
C. test tube
D. burette
3. Pauli exclusion principle is related to
A. quantity of electrons in the valence shell
B. filling the orbitals with lower energy first
C. the filling of degenerated orbitals
D. quantum numbers of electrons
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