Matter & Atoms
This subatomic particle has a positive charge and is located in the nucleus
What is a proton?
According to Kinetic Molecular Theory, gas particles are in constant, random, ______ motion
What is a straight line?
This type of invisible radiation from the sun has a higher frequency than visible light.
What is UV or Ultraviolet?
These are the weak electrical attractions between molecules that determine a substance's boiling point.
What are intermolecular forces/IMFs ?
This is the smallest unit of an element that maintains the properties of that element.
What is an Atom?
This term describes a substance, like distilled water, that consists of only one type of molecule or atom.
What is a Pure Substance?
If you decrease the volume of a gas, the pressure will do this.
What is increase?
High-energy photons have a (longer or shorter) wavelength than low-energy photons
What is shorter?
This type of property, like density or boiling point, can be observed without changing the substance's identity
What is a Physical Property?
Salt dissolving in water is a (physical or chemical) change
What is a physical change?
These are the negative subatomic particles that occupy the space around the nucleus.
What is an electron?
This temperature scale is used in gas law calculations and starts at absolute zero.
What is Kelvin?
This is the relationship between a photon's frequency and its energy
What is directly proportional?
When a substance changes from a liquid to a gas, the particles are (overcoming or forming) intermolecular forces
What is overcoming?
This state of matter has a definite volume but takes the shape of its container.
What is a liquid?
A bowl of cereal with milk is an example of this type of matter because the components can be physically separated
What is a mixture?
This happens to the speed of gas particles when the temperature is increased.
What is speed up?
When an atom absorbs energy and an electron moves to a higher energy level, the atom is in this state.
What is excited state?
This macroscopic property describes a substance's shininess.
What is luster?
The number of these subatomic particles determines the identity of an element.
What is a proton?
This is the part of the atom that contains almost all of its mass but very little of its volume.
What is the nuclues?
This property of gases allows them to be squeezed into small containers because there is so much empty space between particles.
What is compressibility?
This process occurs when radiation has enough energy to remove an electron from an atom.
What is ionization?
Large molecules generally have (stronger or weaker) intermolecular forces than small molecules
Stronger
Explain why a gas has no definite shape or volume in terms of IMFs
The IMFs are too weak to hold the substances together.