Matter
Solubility
Emulsions
The Atom
Periodic Table
100
A pure substance which cannot be broken down by chemical or physical means.
What is an element?
100
When a solute dissolves in a solvent, the mixture is called this.
What is a solution?
100
Emulsions are an example of this physical combination of 2 or more substances.
What is a mixture?
100
This subatomic particle has a negative charge and a negligible mass.
What is an electron?
100
Elements in the periodic table are arranged by this number, which depends on the number of protons in an atom.
What is the atomic number?
200
Greek for "same kind", in chemistry this term describes matter of a uniform composition.
What is homogeneous?
200
This phrase describes a common rule of solubility: nonpolar substances dissolve nonpolar substances, and polar substances dissolve polar substances.
What is "like dissolves like"?
200
A substance added to two immiscible substances that allows them to mix.
What is an emulsifying agent or surfactant?
200
These two subatomic particles contribute to the atomic mass of an atom.
What is the proton and neutron?
200
These elements are lustrous (shiny), malleable (able to bend), and great conductors of heat and electricity.
What are metals?
300
Salt water or NaCl(aq) would be classified as this type of matter.
What is a mixture?
300
This term means unable to dissolve.
What is insoluble?
300
This term means "water-loving" and describes polar substances.
What is hydrophilic?
300
The existence of this small, dense, positively-charged region of the atom was first demonstrated by Ernest Rutherford during his Gold-Foil experiment.
What is the nucleus?
300
This highly reactive group of gases all have 7 electrons in their outermost shell.
What is the halogens?
400
Ethane (C4H8) would be classified as this type of matter.
What is a compound?
400
Substances that dissolve in water usually have an uneven distribution of charge, so we describe them with this term.
What is polar?
400
This term could be used interchangeably with "lipophilic" and describes "water-fearing" nonpolar substances, unlikely to dissolve in water.
What is hydrophobic?
400
This term describes the outermost electron or shell in an atom.
What is valence?
400
The amount of energy required to remove the outermost electron in an atom.
What is ionization energy?
500
This rule tells us that matter and energy can neither be created nor destroyed.
What is the law of conservation?
500
A nonpolar stain would be best removed by a cleaner with this polarity.
What is nonpolar?
500
In mayonnaise, the proteins in this common grocery store item allow the oil and vinegar to mix.
What is an egg?
500
This rule states that in order to be stable, atoms generally seek 8 electrons in their outermost shell.
What is the octet rule?
500
This phenomenon is responsible for the decrease in ionization energy as you go down a group of the periodic table.
What is electron shielding?
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