Atoms and Molecules
H or Cl is an example of one or two letters representing an element
Chemical symbol
Symbols for elements are combined to show how many atoms of each element make up a molecule of a substance
Chemical formula
3 states of matter
solid, liquid, gas
Energy that matter has because of motion
Kinetic Energy
A portion of the universe that a scientist identifies for study
system
Anything that occupies space
Matter
A chemical bond is a strong force of attraction that holds two atoms together
binding force
Molecules in gaseous water not held together by attractive forces. They are far apart and move freely
Water Vapor (GAS)
Stored Energy in matter due to its position relative to other matter
Potential Energy
A characteristic tat is large enough to see, handle or measure without magnification. ex. melting point
macroscopic property
The fundamental building blocks of matter and they combine to form larger particles of matter
Atoms
When 2 or more atoms combine they form?
Molecules
Water - molecules are held close together by attractive forces but they can still move around
Liquid
Total kinetic energy of all the particles that make up the matter
Thermal Energy
Liquid Gallium flow into different shapes but _________ does not change
Volume
The simplest form of matter that has a characteristic set of properties.
element
What is CO2
Carbon dioxide
Molecules are locked in fixed pattern by attractive forces
Solid
Energy stored in the chemical bonds that holds atoms together; This energy can be released or absorbed during a chemical process.
Chemical Potential Energy
Solid gallium has ________ kinetic energy than liquid gallium
less
Used to represent atoms and their interaction with each other
Models.
_____________ is combined to make the chemical formula for a molecule.
Chemical symbols
Water molecules in ice are spaced ________ than in liquid water
further apart
A ball will fall due to gravity and _____________ energy
potential
A hand transfers __________ energy to gallium causing it to melt
thermal