Periodic classification hard

Periodic Classification Quiz (Hard)

1. Which of the following elements has the highest ionization energy?

a) Hydrogen b) Oxygen c) Helium

2. The concept of dual nature of electrons was given by:

a) J.J. Thomson b) Albert Einstein c) Louis de Broglie

3. What is the maximum number of electrons that can occupy the 4d subshell?

a) 2 b) 6 c) 10

4. The Aufbau principle is used to:

a) Determine the charge of an ion b) Determine the energy level of an electron c) Fill electrons in atomic orbitals

5. What is the electron configuration of a chlorine ion (Cl-)?

a) 1s2 2s2 2p6 3s2 3p6 b) 1s2 2s2 2p6 3s2 3p5 c) 1s2 2s2 2p6 3s2 3p7

6. The number of orbitals in the third principal energy level is:

a) 1 b) 3 c) 9

7. The energy of an electron in an atom is quantized. What does this mean?

a) Electrons can have any energy value b) Electrons can only have certain specific energy levels c) Electrons have negative energy

8. Which of the following elements has the highest electron affinity?

a) Sodium b) Chlorine c) Neon

9. The angular momentum quantum number (l) can have integral values ranging from:

a) 0 to n-1 b) 0 to n c) 1 to n-1

10. The Pauli exclusion principle states that:

a) Electrons in the same orbital must have opposite spins b) Electrons in the same orbital must have the same spin c) Electrons in different orbitals can have the same spin