Atomic theory 2022

What conclusion did Thomson make?

• cathode ray tubes are cool

• matter must contain negatively charged particles

• matter must contain positively charged particles

Which scientist discovered the electrons?

• Dalton

• Thomson

• Atristotle

• Bohr

What is a particle with one negative charge called?

• electron

• proton

• quark

• neutron

The smallest particle of an element that still represents that element.

• Nucleus

• electron

• proton

• atom

J.J Thomson conducted his experiments related to an atom in a ______

• Hard boiling tube

• Capillary tube

• CRT

• U tube

Thomson's atomic theory suggested that the atom is

• Divisible

• Non - Divisible

• None of these

• All of the above

According to J.J Thomson's atomic model, negative charges are embedded in

• A lump of positive charges

• A lump of neutral charges

• Nucleus

• A lump of small atoms

Who proposed the first atomic view of matter?

• Lavoisier
• Empedocles
• Democritus
• Priestley

What did John Dalton call his atomic model?

• Billiard ball

• Plum Pudding

• Bohr Model

• Quantum Mechanical Model

Check all of Daltons Postulates

• All matter is composed of extremely small particles called atoms

• All atoms of a given element are identical, having the same size, mass, and chemical properties. Atoms of a specific element are different from those of any other element.

• Atoms cannot be created, divided into smaller particles, or destroyed.

• Different atoms combine in simple whole number ratios to form compounds.

• In a chemical reaction, atoms are separated, combined, or rearranged.