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Flashcards in Chapter 1 & 2 Deck (22)
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1

Matter

Matter is anything that has mass and takes up space.

2

Energy

Energy is the capacity to do work or transfer heat.

3

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.

4

Scientific Method

Collect information
Formulate Hypothesis
Test Hypothesis
Formulate Theory
Repeatedly Test Theory

5

States of Matter

Solid, Liquid, Gas

6

Physical Properties

Can be observed without changing a substance into another substance.

7

Chemical Properties

Can only be observed when a substance is changed into another substance.

8

Element

An element is a substance which can not be decomposed to simpler substances.

9

Compound

A compound is a substance which can be decomposed to simpler substances because it is made up of more than one element.

10

Heterogeneous

Mixtures that can vary in composition throughout a sample.

11

Homogeneous

Mixtures can have the same composition throughout the sample.
(Is also called a Solution)

12

Subatomic Particles

Protons, Neutrons and Electrons

13

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

14

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.

15

Atomic Weight

[(isotope mass)x(fractional natural abundance)] for ALL isotopes.

16

Atom

Basic unit of a chemical unit.

17

Molecule

Groups of atoms that are bonded together

18

Aalkali Metals

Li, Na, K, Rb, Cs, Fr, H (R1)

19

Alkaline Earth Metals

Be, Mg, Ca, Sr, Ba, Ra (R2)

20

Metalloids

B, Si, Ge, As, Sb

21

Halogens

F, Cl, Br, I

22

Noble Gas

He, Ne, Ar, Kr, Xe, Rn