Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

15 Questions

0 Views

Atomic Theory MCQ2

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the definition of the atomic number of an atom?

The number of electrons in the outermost energy level

The sum of protons and neutrons in the nucleus

The number of protons in the nucleus (correct)

The average mass of an atom of an element

What is the term for atoms with the same number of protons but different numbers of neutrons?

Molecules

Isomers

Isobars

Isotopes (correct)

Who conducted the experiment that led to the discovery of sub-atomic particles?

Robert Milikan

William Crooke

JJ Thomson (correct)

John Dalton

What is the name of the experiment that led to the discovery of the nucleus of an atom?

The α-particle scattering experiment Signup and view all the answers

Who suggested the name 'electron' for negatively charged particles?

Johnstone Stoney Signup and view all the answers

What is the Law of Conservation of Mass related to?

Chemical reactions Signup and view all the answers

What is the purpose of the Maltese Cross experiment?

To study the properties of cathode rays Signup and view all the answers

What is the definition of the relative atomic mass of an element?

The average mass of an atom of the element relative to 1/12 the mass of an atom of carbon-12 Signup and view all the answers

Who developed the Bohr model of the atom?

Niels Bohr Signup and view all the answers

What is the primary difference between the atomic number and the mass number of an atom?

The sum of protons and neutrons in the nucleus Signup and view all the answers

Which scientist's experiment led to the conclusion that sub-atomic particles exist?

JJ Thomson's cathode ray experiment Signup and view all the answers

What is the significance of the oil drop experiment conducted by Robert Milikan?

It measured the charge of an electron Signup and view all the answers

What is the primary characteristic of isotopes of an element?

They have the same number of protons but different numbers of neutrons Signup and view all the answers

What is the main conclusion drawn from the results of Ernest Rutherford's alpha-particle scattering experiment?

The structure of the atomic nucleus Signup and view all the answers

What is the principle on which a mass spectrometer operates?

The mass spectrometer works on the principle that ions can be separated according to their mass. Signup and view all the answers