Module 1
Anything that has mass and takes up space
What is matter?
Matter cannot be created or destroyed; it can only change forms
What is the law of mass conservation?
Positive and negative
What are 2 types of electrical charge?
Be
What is beryllium?
An indication of how close a measurement is to the true value?
What is accuracy?
An indication of the scale on the measuring device that was used.
What is precision?
Any substance that cannot be broken down (decomposed) into simpler componenets
What is an element?
Atoms with the same number of protons but different numbers of neutrons
What are isotopes?
Mn
What is magnese?
The proportion of elements in any compound is always the same
What is the law of definite proportions?
Given Unit X Conversion Factor = Wanted Unit
What is the factor-label method?
A mixture with a composition that is always the same no matter what part of the sample is observed
What is a homogeneous mixture?
The total number of neutrons and protons in an atom
What is the mass number?
Ar
What is argon?
A compound that contains at least 1 metal and 1 nonmetal atom
What is an ionic compound?
Measures how hard gravity pulls on an object
What is weight?
A mixture with a composition that is different depending on what part of the sample is observed
Positive particles emitted by certain radioactive isotopes
What are alpha particles?
V
What is vanadium?
A glass tube filled with a tiny amount of gas and connected to a battery
What is a Crookes tube?
Measures how much matter exists in an object
What is mass?
A compound made up of nonmetal atoms
What is a covalent compound?
Protons are clustered together at the center of the atom while electrons orbit around the nucleus
What is the Rutherford model?
Sc
Scandium
He is best known for the development of atomic theory. He was a Christian, chemist, physicist, and meteorologist.
Who is John Dalton (1766-1844)?