Chemistry Vocab
Sometimes called the “special seven”, these are compounds of 2 atoms of the same element who have the same nucleus (eg. H2, O2, N2, Cl2, Br2, I2, F2).
What are “homonuclear diatomic molecules”?
What movement is based on to determine if there has been motion/change in position.
What is “reference point” or “frame of reference”?
The elemental atom containing 17 electrons.
What is chlorine (Cl)?
The net force acting on a rope with 2 equally strong children pulling on opposite ends.
What is 0 Newtons?
Plum Pudding Model
Positive blob of matter spaced with negative particles throughout.
Characteristics of a substance that can be observed/measured without changing the composition of the chemicals.
What are “physical properties”?
A physical measurement containing both magnitude and direction.
What is “vector quantity”?
The number of extra electrons gained by an atom of fluorine (F) with a charge of -1.
What is 1 electron?
The acceleration of a 10g object free falling 29,032 ft down Mt. Everest.
What is 9.8 m/s2 (32 ft/s2)?
Convex vs. Concave Lenses
Also see converging vs. diverging lenses
Atoms of the same element (# of protons) but differing numbers of neutrons.
What are “isotopes”?
The tendency of an object to resist changes in its velocity.
What is “inertia”?
The scientific name of the following binary compound: H2O
What is dihydrogen monoxide? (Commonly referred to as “water”.)
What is 1,250 Joules (J = N x m)?
Electron Dot Diagram for phosphorous (P)
Elemental symbol (P) surrounded by number of valence electrons (5) arranged evenly in 4 sides.
The natural (passive) movement of gases/liquids that spreads particles from areas of high to low concentration.
What is “diffusion”?
This is transferable upon contact and known as the ability to do work.
What is “Energy”?
The formula for the following binary compound: lithium oxide.
What is Li2O?
The frequency of an electromagnetic ray whose wavelength is 3m traveling at the constant speed of light.
What is 9.0 x 108 Hz (900,000,000 1/sec)?
Empedocles’ 4 elements connected by 4 qualities.
FIRE (dry) EARTH (cold) WATER (wet) AIR (hot). -> repeat in a cycle
When a hypothesis is not necessarily needed, but observations can be explained and questions can be answered by research (sometimes called an educated guess).
What is an “inference”?
A change in sound frequency caused by the motion of the sound source, the listener, or both.
What is “Doppler effect”?
Provide coefficients for the following unbalanced chemical equation: C6H12O6 + O2 -> H2O + CO2
What is 1 + 6 -> 6+ 6
The efficiency of a machine that is able to emit 150 J of energy after an input distance of 17m and a force of 44 N has been applied.
What is 20%?
(Woutput / Winput) x100% = Efficiency
Endo- or Exo-thermic chemical reaction table
Rxn progress (x-axis)
Chem Energy (y-axis)
Activation Energy (hump)
Either a gain or release of energy