The species with no electron in the 3d-orbital is
\(Zn^{2+}\)
\(Sc^{3+}\)
Cu
\(Mn\)
Correct answer is B
Scandium has electronic configuration \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{1}4s^{2}\) hence, \(Sc^{3+}\) has configuration \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}\). Hence, no electron in the 3d-orbital.
Pauli exclusion principle is related to
quantity of electrons in the valence shell
filling the orbitals with lower energy first
the filling of degenerated orbitals
quantum numbers of electrons
Correct answer is D
Pauli Exclusion Principle states that, in an atom or molecule, no two electrons can have the same four electronic quantum numbers.
The following glasswares are used to measure the volume of liquids EXCEPT
graduated beaker
pipette
test tube
burette
Correct answer is C
Test tubes are convenient containers for heating small amounts of liquids or solids with a Bunsen burner or alcohol burner.
Which of the following species determines the chemical properties of an atom?
Electron
Neutron
Nucleus
Proton
Correct answer is A
An element's chemical properties depend on its valence electrons.The chemical properties of elements depend on an element's electron configuration.
vibrational motion
vibrational and translational motion
vibrational and random motion
random and translational motion
Correct answer is A
Solids vibrate but generally do not move from place to place.