The ATOM

Who is credited with the scientific study of the atom in the early 1800s?

• John Dalton

• Isaac Newton

• Albert Einstein

• Niels Bohr

According to Dalton's Atomic Theory, what is matter composed of?

• Extremely small particles called atoms

• Large molecules

• Protons and neutrons

• Electrons and protons

What does the Law of Conservation of Mass state?

• Mass is conserved in any process

• Mass can be created or destroyed

• Mass increases after a chemical reaction

• Mass decreases after a chemical reaction

Tags

NGSS.HS-PS1-7

What is an element defined as?

• A pure substance that cannot be separated into simpler substances

• A mixture of different compounds

• A combination of atoms and molecules

• A substance that can be broken down by chemical means

What did JJ Thomson discover using the cathode ray tube?

• The first subatomic particle - the electron

• The proton

• The neutron

• The nucleus

Who determined the charge of an electron was -1 using an oil drop apparatus?

• Albert Einstein

• jj Thomson

• Ernest Rutherford

• Robert Millikan

The TV was invented after experimenting with cathode rays. What subatomic particle creates the flashes of light in the cathode?

• neutron and electrons

• protons and electrons

• only protons

• only electrons

What is the charge of an electron?

• +1

• 0

• -1

• +2

Who conducted the gold foil experiment?

• James Chadwick

• Albert Einstein

• Ernest Rutherford

• Niels Bohr

What did Rutherford conclude about the atom's positive charge?

• It is spread throughout the atom

• It is located in the electrons

• It is concentrated in the nucleus

• It is located in the neutrons

Tags

NGSS.HS-PS1-8