Science Final Flashcards
(32 cards)
Can be observed as it changes into a different state of matter
Chemical properties
Physical properties of matter change, identity stays the same
Physical change
Change in matter where the substances change into different substances with different properties.
-the substance that changes no longer have the same properties because its identity is different
Chemical change
When atoms bond together in new combinations, new substances form
Chemical reaction
Uneven forces acting on the particles on the surface of a liquid
Surface tension
Change of state from gas to solid without going through liquid state
-thermal energy is removed from gas
Deposition
Change of state from solid to gas without liquid state
-thermal energy added to gas
Sublimation
Change of state from gas to liquid, gas loses thermal energy
Condensation
Temperature is constant, pressure of a gas goes up if volume goes down, and pressure of a gas goes down if volume goes up
Boyle’s law
Pressure is constant, volume of a gas increases when temperature increases
Charles’s law
2 protons and 2 neutrons; When an atom releases an alpha particle, the atomic number decreases by 2
Alpha decay
The atomic number increases by 1 because it gains a proton; the neutron changes into a proton and a beta particle is released (high energy electron)
Beta decay
It contains high energy and no particles, it has a neutral charge and it does not change the element
Gamma decay
Group #1, these elements are HIGHLY reactive, always found in compounds in nature, react violently with water, soft enough to be cut with a knife
Alkali metals
Group #2, only found in compounds, does not occur in nature, low density
Alkaline earth metals
Located in middle and the bottom 2 rows of periodic table; These have high boiling and melting point, high density, have greater strength; #3-12
Transition metals
17, refers to an element that can form a salt and react with a metal; easily form compounds, are less reactive as you go down the group
Halogens
18, are chemically stable, are not found in compounds unless in a lab
Noble gases
Evenly mixed, aka solution, cannot be seen
Homogenous mixture
Area unevenly mixed, can be seen by the naked human eye or under a microscope
Heterogenous mixture
Change of state from liquid to gas; during boiling point, liquid vaporises at surface and within the liquid, the bubbles aka vaporised particles rise to the top. Evaporation: only occurs at surface of a liquid
Vaporization
Be able to explain factors that affect the size of a reaction
Temperature, concentration, and surface area affect the rate of a reaction
Be able to explain how energy of a particles causes changes in the state of matter
Particles with slower energy are compact and tight, thus being a solid, but particles with super fast energy are spread out and spacious, thus being a gas. (Liquid is in between)
Matter you can observe and measure without changing its identity
Physical properties
