Question 1

Which model of the atom first proposed that electrons are embedded in a positively charged 'gel' or 'pudding'?

Accepted Answer

Thomson Model

Question 2

According to the Bohr model, what happens when an electron jumps from a higher energy level to a lower energy level?

Accepted Answer

Energy is emitted as light

Question 3

Which statement best describes the difference between quantized and continuous energy emission?

Accepted Answer

Quantized emission means energy is released in specific packets called quanta

Question 4

If an electron in a hydrogen atom moves from $n=4$ to $n=2$, what happens?

Accepted Answer

The electron loses energy and emits a photon

Question 5

Which equation correctly represents the energy of a photon emitted when an electron transitions between two energy levels in a hydrogen atom?

Accepted Answer

$E = h 
u$

Question 6

What is the maximum number of electrons that can occupy the $d$ sublevel in a given energy level?

Accepted Answer

10

Question 7

Which principle quantum number ($n$) corresponds to the energy level that contains $f$ orbitals for the first time?

Accepted Answer

$n=4$

Question 8

How many electrons can a single orbital hold?

Accepted Answer

2

Question 9

Which scientist's model first explained why elements have similar chemical properties?

Accepted Answer

Bohr

Question 10

What is the shape of a $p$ orbital?

Accepted Answer

Peanut-shaped

Question 11

If the principal quantum number $n=3$, how many total orbitals are present in that energy level?

Accepted Answer

9

Question 12

Which statement about electron movement in the Bohr model is correct?

Accepted Answer

Electrons travel in fixed, concentric orbits with specific energies

Question 13

What is the main difference between the Rutherford and Bohr models of the atom?

Accepted Answer

Bohr's model includes quantized energy levels for electrons

Question 14

Which of the following best describes the ground state of an atom?

Accepted Answer

The state where electrons are in the lowest possible energy levels

Question 15

How many $p$ orbitals are present in a single energy level?

Accepted Answer

3

Question 16

Which quantum number determines the shape of an orbital?

Accepted Answer

Angular momentum quantum number ($l$)

Question 17

What is the total number of electrons that can be accommodated in the $n=2$ energy level?

Accepted Answer

8

Question 18

Which of the following is true about the emission spectrum of hydrogen?

Accepted Answer

It consists of discrete lines corresponding to quantized energy transitions

Question 19

When an atom absorbs energy, what happens to its electrons?

Accepted Answer

They move to higher energy levels

Question 20

Which statement about atomic orbitals is correct?

Accepted Answer

Each orbital can hold a maximum of two electrons

Atomic Models, Electron Energy Levels, and Atomic Orbitals

Study Guide - Practice Questions