How can we help?

You can also find more resources in our Help Center.

32 terms

Introduction of Matter

STUDY
PLAY
Anything that has mass and takes up space
Solids
Liquids
Gases
Chemistry
is the study of the properties of matter and how matter changes
Every form of matter has 2 kinds of properties:
Physical
Chemical
Physical Properties
Characteristics that can be observed without changing it into a different substance
Properties of Matter
Texture, Phase changes, Appearance, Flexibility, Conductivity, and Ability to dissolve
Chemical Properties
Ability to change into a different substance with different properties
Physical Changes in Matter
Any change that alters the form or appearance of matter (change in size, shape, color, state, density)
No new substance is formed
Chemical changes
Substance is transformed into a different substance with different properties
Combustion (burning)
Electrolysis
Oxidation (rusting)
Tarnishing
The Law of Conservation of Mass
Matter is never created or destroyed, it only changes.
The products may change, but the mass will stay the same
Elements
Simplest substances
An element that can't be broken down any further by physical or chemical means
Represented by 1-2 letter symbols
Atoms
Basic particle from which all elements are made
Atoms are made of what
Protons (+ charge)
Neutrons (neutral)
Electron Cloud (- charge)
Molecules
2 or more atoms chemically combined
Chemical bond
force of attraction between atoms
Compounds
Pure substance of 2 or more elements chemically combined
Set ratios of atoms
(C6H12O6)
Mixture
Made of 2 or more substances
Physically combined so can be physically separated
No set ratio
Mixtures
Heterogenous
Homogenous
Solutions
Colloids
Weight
Measure of the force of gravity
Weight changes on different planets because gravity is different
Mass
How much matter is in an object
Not affected by gravity
Volume
The amount of space that matter occupies
Units of Volume
Liter (L)
Milliliter (ml)
Cubic centimeter (cm3)
Units =
cm x cm x cm = cm3
Density
Relates the mass to the volume
The amount of matter and how much space it occupies
Unit of measure is
g/ml or g/cm3
Calculation of density
Mass ÷ Volume = Density OR M/V=D
Each element has a specific what
density
Every chemical or physical change requires a transfer of energy - either what
absorbing or releasing
Types of energy
Chemical, Electrical, Biomass, Solar, Nuclear, Electromagnetic, and others
Temperature
The average kinetic energy of molecules
Thermal energy (heat)
The average potential and kinetic energy of molecules (actual energy)