Flashcards in Chapter 1 & 2 Deck (22)
Matter is anything that has mass and takes up space.
Energy is the capacity to do work or transfer heat.
The Law of Constant Composition (The Law of Definite Proportions)
Compounds have a definite composition. That means that the relative number of atoms of each element in the compound is the same in any sample.
Repeatedly Test Theory
States of Matter
Solid, Liquid, Gas
Can be observed without changing a substance into another substance.
Can only be observed when a substance is changed into another substance.
An element is a substance which can not be decomposed to simpler substances.
A compound is a substance which can be decomposed to simpler substances because it is made up of more than one element.
Mixtures that can vary in composition throughout a sample.
Mixtures can have the same composition throughout the sample.
(Is also called a Solution)
Protons, Neutrons and Electrons
Rutherford models of the atom.
Ernest Rutherford shot alpha particles at a thin sheet of foil and observed the pattern of scatter of the particles
Millikan Oil-Drop Experiment
Once the charge/mass ratio of the electron was known, determination of either the charge or the mass of an electron would yield the other.
[(isotope mass)x(fractional natural abundance)] for ALL isotopes.
Basic unit of a chemical unit.
Groups of atoms that are bonded together
Li, Na, K, Rb, Cs, Fr, H (R1)
Alkaline Earth Metals
Be, Mg, Ca, Sr, Ba, Ra (R2)
B, Si, Ge, As, Sb
F, Cl, Br, I