9 SCI 6th MONTHLY EXAM

According to Bohr model, how many electrons can the first orbital hold

• 2

• 4

• 6

• 8

What happens to the energy of an electron when it jumps from an outer to an inner orbit?

• It is absorbed

• It is emitted/released

• It remains constant

• It either increase or decrease

Name of the model of the atom that scientists use today

• Billiard Model

• Plum Pudding Model

• Nuclear Model

• Quantum Mechanical Model

Described the electrons as waves that move in orbitals

• Chadwick

• Rutherford

• Schrodinger

• Thomson

proposed the probability that electrons will be found in certain regions around the nucleus of an atom

• Chadwick

• Rutherford

• Erwin Schrodinger

• Thomson

Who states that "it is impossible to determine both the momentum and the position of an electron at the same time accurately?

• Hund's Rule

• Uncertainty Principle

• Aufbau Principle

• Pauli's Exclusion Principle

Which occurs when an electron moves from high energy level to a low energy level?

• The atoms move faster

• Colored lights is given off

• This process is not possible

• Another electron goes from a low energy to a high-energy level

What is the group and period of an element with an electronic configuration 1s²2s²2p⁶?

• Group ll period 3

• Group 8 period 2

• Group 4 period 2

• Group 8 period 4

Which is the correct valence electron of element found in group 2 of the Periodic Table?

• 3p¹

• 4s²

• 3p⁵

• 3s²

Which subshells can the electron with this quantum numbers n = 3,1 = 2 be found?

• 1s

• 2p

• 3d

• 4f