Topic 4.0 Quantum Mechanical Model

What did Niels Bohr say about electrons?

• Electrons orbit the nucleus in circles.

• Electrons are stationary inside the nucleus.

• Electrons do not exist in atoms.

• Electrons are positively charged particles.

Each sublevel has a different number of ______ (orientations).

• shapes

• colors

• sizes

• weights

How many orbitals are present in the S sublevel?

• 1

• 2

• 3

• 4

How many total electrons does Argon have?

• 18

• 8

• 20

• 36

How many valence electrons does Bromine (1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵) have?

• 7

• 5

• 8

• 2

Write the electron configuration for Phosphorus (P).

• 1s², 2s², 2p⁶, 3s², 3p³

• 1s², 2s², 2p⁶, 3s², 3p⁵

• 1s², 2s², 2p⁶, 3s², 3p²

• 1s², 2s², 2p⁶, 3s², 3p⁶

According to the Aufbau Principle, electrons occupy the ______ possible energy state first before filling higher energy states.

• lowest

• highest

• average

• random

What is the atomic number of Chlorine (Cl)?

• 17

• 12

• 35

• 20

Draw the orbital diagram for Silicon. (1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p)

• 1s: ↑↓, 2s: ↑↓, 2p: ↑↓ ↑↓ ↑↓, 3s: ↑↓, 3p: ↑↓ ↑ ↑, 4s: (empty), 3d: (empty), 4p: (empty)

• 1s: ↑↓, 2s: ↑↓, 2p: ↑↓ ↑↓ ↑↓, 3s: ↑↓, 3p: ↑↓ ↑↓ ↑, 4s: (empty), 3d: (empty), 4p: (empty)

• 1s: ↑↓, 2s: ↑↓, 2p: ↑↓ ↑↓ ↑, 3s: ↑↓, 3p: ↑↓ ↑ ↑, 4s: (empty), 3d: (empty), 4p: (empty)

• 1s: ↑↓, 2s: ↑↓, 2p: ↑↓ ↑↓ ↑↓, 3s: ↑↓, 3p: ↑ ↑ ↑, 4s: (empty), 3d: (empty), 4p: (empty)

Draw the orbital diagram for Krypton. (1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p)

• 1s: ↑↓, 2s: ↑↓, 2p: ↑↓ ↑↓ ↑↓, 3s: ↑↓, 3p: ↑↓ ↑↓ ↑↓, 4s: ↑↓, 3d: ↑↓ ↑↓ ↑↓ ↑↓ ↑↓, 4p: ↑↓ ↑↓ ↑↓

• 1s: ↑↓, 2s: ↑↓, 2p: ↑↓ ↑↓ ↑↓, 3s: ↑↓, 3p: ↑↓ ↑↓ ↑↓, 4s: ↑↓, 3d: ↑↓ ↑↓ ↑↓ ↑↓, 4p: ↑↓ ↑↓ ↑↓

• 1s: ↑↓, 2s: ↑↓, 2p: ↑↓ ↑↓ ↑↓, 3s: ↑↓, 3p: ↑↓ ↑↓ ↑↓, 4s: ↑↓, 3d: ↑↓ ↑↓ ↑↓ ↑↓ ↑↓, 4p: ↑↓ ↑↓

• 1s: ↑↓, 2s: ↑↓, 2p: ↑↓ ↑↓ ↑↓, 3s: ↑↓, 3p: ↑↓ ↑↓ ↑↓, 4s: ↑↓, 3d: ↑↓ ↑↓ ↑↓ ↑↓, 4p: ↑↓ ↑↓