Chemistry Chapter 4 Lesson 2

What is the smallest unit of an element that retains all the properties of that element?

• Molecule

• Atom

• Compound

• Mixture

According to Dalton's Model, what is the structure of an atom?

• Complex structure with orbitals

• Simple solid sphere

• Nucleus with electrons

• Layered shell model

Tags

NGSS.MS-PS1-1

Who established the existence of the atom, prompting new questions about its nature?

• John Dalton

• Isaac Newton

• Albert Einstein

• Niels Bohr

Who invented the Cathode Ray Tube (CRT)?

• Thomas Edison

• Nikola Tesla

• Sir William Crooks

• Alexander Graham Bell

What is the main function of a cathode in a Cathode Ray Tube?

• To emit light

• To emit electrons

• To absorb electrons

• To generate sound

Who observed that a beam of light was produced when an electrical current was applied, originating at the cathode and moving towards the anode?

• J.J. Thomson

• Albert Einstein

• Sir William Crookes

• Niels Bohr

What did Sir William Crookes call the beam of light produced in his experiments?

• Alpha ray

• Beta ray

• Gamma ray

• Cathode ray

What did JJ Thomson use in his experiments?

• A telescope

• A microscope

• A cathode ray tube

• A spectrometer

What did JJ Thomson observe when he put a paddle wheel inside the CRT?

• The paddle wheel stopped

• The paddle wheel spun

• The paddle wheel melted

• The paddle wheel disappeared

What conclusion did JJ Thomson make from his observation with the paddle wheel?

• Light moved the paddle wheel

• Sound moved the paddle wheel

• Something with mass moved the paddle wheel

• Heat moved the paddle wheel

Tags

NGSS.HS-PS2-1