Parts of an Atom
Smallest unit of matter
Atom
Substance made from 1 type of atom.
Element
When 2 or more atoms join together.
Molecule
The temperature at which a liquid changes into a solid
freezing point
Definite shape and fixed volume. Has low kinetic energy and particles can't move freely.
solid
Positive charge; found in center of atom.
Proton
Element represented by C on the periodic table
Carbon
What common molecule is represented as H2O
Water
The temperature at which a liquid changes to a gas
boiling point
No definite shape, but has fixed volume. Has medium amount of kinetic energy and particles can flow, but not as easily as gases.
Liquid
Neutral charge; found in center of atom.
Neutron
Element represented by O on the periodic table
Oxygen
NaCl is a common molecule that we put on food
Table salt
The amount of matter in a given space
Density
No definite shape or fixed volume. High kinetic energy and particles can move freely.
Gas
Negative charge; circles the center of the atom.
Electron
Represented by the letter N on the periodic table
Nitrogen
This gas molecule is represented as CH4
methane
Properties that can be observed or measured without changing the composition of matter (color, odor, melting point, boiling point, density)
physical properties
At room temperature, a mystery substance is observed to take the shape of its container and can expand or be compressed to change its volume. This mystery substance is most likely a...
Collection of protons, and neutrons in the center of an atom.
Nucleus
Represented by the letter FE on the periodic table
Iron
Pure substances that can be decomposed into new kinds of matter with properties different than the original.
compounds
Characteristics that can only be measured and observed when the substance has a change in chemical composition (Corrosiveness, flammability, toxicity, acidity, or chemical reactivity).
Chemical properties
Which substance flows to the bottom of its container.
Liquid