SCIENCE 9 Q2 - SUMMATIVE TEST

The electrons on the outermost energy level are referred to as

• electrostatic

• Pauli electrons

• Ernest electrons

• valence electrons

Which explains the filling up of the orbital in the order of increasing energy?

• Octet Rule

• Hund’s Rule

• Pauli’s Exclusion Principle

• Aufbau's Principle

The negatively charged particles moving about in the outer part of the atoms.

• protons

• electrons

• neutrons

• nucleus

Which shows the correct order in the following atomic orbitals?

• f orbital, d orbital, p orbital, s orbital

• p orbital, f orbital, s orbital, d orbital

• s orbital, d orbital, f orbital, p orbital

• s orbital, p orbital, d orbital, f orbital

Who formulated the “Uncertainty Principle”?

• Erwin Schrodinger

• James Maxwell

• Louise de Broglie

• Werner Heisenberg

Which of the following postulates explain that no two electrons can have the same set of four quantum numbers?

• Hund’s Rule

• Aufbau principle

• Dalton’s Atomic Theory

• Pauli’s Exclusion Principle

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

• It is absorbed

• It remains constant

• It is emitted/released

• It could either increase or decrease

The ground state electron configuration of Fe is

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁷

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁸

Which statement is NOT correct for an atom with an electron configuration of 1s² 2s² 2p⁶ 3s² 3p⁵?

• It has 17 electrons

• The 3p orbitals are filled

• It has 3 main energy levels

• The 3s orbitals are filled

Which of the following energy levels can accommodate a maximum of 8 electrons?

• 1st energy level

• 2nd energy level

• 3rd energy level

• 4th energy level