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Matter/Chem--Genoa

States of Matter, Phase Changes & Chemistry

QuestionAnswer
The smallest unit of an element that maintains the properties of that element. (Always has the same # of protons for one type of element.) atom
The change of a liquid to gas throughout the liquid; occurs quickly at high temperatures. boiling
The change of a substance from one physical state to another. change of state
The change of state from a gas to a liquid. condensation
Power that may be translated into motion or cause a physical change; "the ability to do work"; (NOT MATTER--NOT MADE OF ATOMS) energy
The change at the surface of a liquid into a gas; occurs slower at lower temperatures. evaporation
The change of state from a liquid to a solid by removing energy. freezing
The state of matter that does not have a definite volume nor shape. gas
The state of matter that has a definite volume but not a definite shape. liquid
A measure of the amount of matter in an object. mass
Anything that has mass and volume. matter
The process in which a gas changes directly into a solid. deposition
A measure of the force of gravity acting on an object. weight
The change of state from a solid to a liquid by adding energy. melting
The state of matter in which the volume and shape of a substance are fixed. solid
The physical forms of matter which include solid, liquid, and gas. states of matter
The process in which a solid changes directly into a gas. sublimation
A measure of the amount of heat (how hot or cold something is); a measure of the movement of particles. temperature
A measure of the amount of space (3-D) of an object. volume
The sum of the numbers of protons and neutrons in the nucleus of an atom. atomic weight
The smallest unit of an element/matter that has the properties of that element. atom
A subatomic particle that has a negative charge. These form a "cloud" around the nucleus. These account for most of the volume of an atom. electron
An atom's central region which is made up of protons and neutrons--most of the mass of an atom. nucleus
A subatomic particle that has a postive charge and is found in the nucleus of an atom. proton
A subatomic particle that has no charge (neutral) and is found in the nucleus of an atom. neutron
The number of protons in the nucleus of an atom. atomic number
A substance that cannot be separated or broken down into simpler substances by chemical means; composed of a single type of atom. (Currently, there are 118 varieties.) element
Atoms and molecules are in constant motion giving them _____ energy. kinetic
A change in _____ can cause a change in state (solid --> liquid, etc.). temperature
How many atoms of hydrogen are in one molecule of water (H2O)? two
How many atoms of oxygen are in one molecule of water (H2O)? one
Most of an atom is _____ space. empty
The number of electrons in an atom is _____ to the number of protons. equal
Atoms/elements differ from each other based on the number of _____. protons
The center of an atom--location of the protons and neutrons. nucleus
Matter is anything that has mass and volume. The mass/weight of matter is a result of the weight of _____ (center) of the atoms. nucleus
Matter is anything that has mass and volume. The volume is a result of the empty space between the nucleus and _____ of atoms. electrons
What happens to the temperature during a phase change? "It _____ the same." stays
Created by: mrsgilbert