QUIZ - Grade 8

what is an atom?

• the basic unit of a chemical element

• maller than or occurring within an atom.

• blocking particles in chemistry

• particles in sub atomic

3 types of sub-atomic particles

• atom,

• muon and guon

• hybrid glimpse

• Protons, Neutrons and Electrons

_____was the first to propose the existence of atoms in 400 B.C

• ernest rutherford

• Democritus

• J.J Thomson

• Neils Bohr

Planetary Model

• J.J Thomson

• John Dalton

• Neils Bohr

• Erwin Schrodinger

Solid Sphere Model

• J.J Thomson

• Erwin Schrodinger

• Neils Bohr

• John Dalton

Plum Model

• Aristotle

• JJ. Thomson

• Democritus

• Bohr

What does Z stand for?

• the number of protons

• the number of neutrons

• the number of nucleons

What does A stand for?

• the number of protons

• the number of neutrons

• the number of nucleons

What do we call Z?

• the atomic number

• the mass number

What did John Newlands call his periodic relationship between every 8 elements ?

• The law of Triads

• The law of periodicity

• The Law of Octaves

• The Law of Eights