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
The mixture of soil and water is an example of what classification of a mixture?
Suspension
A very fine particle of soil when mixed to water will form a cloudy mixture. How is this mixture classified?
Colloid
The particles of sugar dispersed in water are so small that a clear homogeneous mixture. What is this homogeneous mixture called?
Solution
How are elements classified?
Metals, Nonmetals or Metalloids
What are the three states of matter?
Solid, Liquid and Gas
Compounds are mostly classified as:
Acids and Bases
What is the property of metals that allow them to be rolled without breaking?
Malleability
What is the property of metals that reflects the light that strikes their surfaces, making them appear shiny?
Luster
