Which Greek gentleman first suggested the idea of indivisible "atoms"?
Democritus
What is the change from a gas to a liquid?
Condensation
Who proposed that atoms are indivisible and cannot be destroyed? He also believed that elements are made of atoms.
John Dalton
Which subatomic particle has a negative one charge?
Electron
What is anything that occupies space and has mass?
Matter
Who developed the plum pudding model?
J. J. Thompson
What does most of the atom consist of?
Empty space
Negative
What is the most workable model of matter?
Matter exists in the form of particles in constant motion
What is one example of a compound?
H20 (water)
NaF (sodium fluoride)
NaCl (table salt)
LiCl (lithium chloride)
CO2 (carbon dioxide)
How much bigger is the proton than the electron?
1836 times bigger
What is atomic mass?
The weighted average of the masses of the naturally occurring isotopes for that element.
Daily Double!
What is the difference between mass and weight?
Mass - the amount of matter in an object
Weight - the measure of gravity acting on the matter in an object. can vary based off of location
What is the difference between a physical change and a chemical change?
Physical Change - alters the appearance, not the composition, of a substance
Chemical changes - does alter the composition of a substance
What did Aristotle believe about matter?
Matter had no empty space between atoms and that matter could be cut down indefinitely. He DID NOT believe in particles
What are the three subatomic particles in an atom?
Protons
Neutrons
Electrons
Na+
Give me one example of a physical change.
Give me one example of a chemical change.
Physical change - Boiling, grinding, changing states of matter (freezing, melting, etc.)
Chemical change - burning, chemical reactions
What model did Hantaro Nagaoka propose?
The saturnian model
How many protons?
How many neutrons?
How many electrons?
Six protons
Eight neutrons
Six electrons