Introduction? Flashcards
What are found in the nucleus of an atom?
Protons and Neutrons
What is the negatively charged particle of an atom?
Electrons
What is the positively charged particle of an atom?
Protons
What is the particle of an atom that has no electrical charge?
Neutron
The word “atom” comes from Greek “Atomos” which means what?
Indivisible
Who was the first person to propose that atoms have weights?
John Dalton
Who discovered the electron?
Joseph John Thomson
Who discovered the proton?
Ernest Rutherford
Who discovered the neutron?
James Chadwick
What is anything that occupies space and has mass?
Matter
All forms of matter are composed of the same building blocks called______.
atom
How are substances classified
Elements or Compounds
What is a substance that cannot be broken down into simpler substances?
Element
What is the result from the combination, in definite proportion of mass, of two or more elements?
Compound
How are mixtures classified?
Suspension, Colloids or Solutions