The electrons in the outer shell of an atom are called this type of electron, from the Latin for "power".
What is a valance?
In chemistry, it's a substance with 2 or more different elements; in real estate, it's a property with multiple homes.
What is a compound?
World Book says it is "a poisonous, yellowish-green gas with a strong, unpleasant odor", so let's treat our pool with it
What is chlorine?
It's the boiling point of water on the Celsius scale.
What is 100 degrees?
Chemically, it's the makeup of a pure snowflake.
What is H2O?
A neutron has approximately the same mass as this other type of subatomic particle.
What is a proton?
Atoms in the compound carbon dioxide share two pairs of electrons, forming a double covalent this
What is a bond?
In a flame test, this element--atomic number 11--burns yellow; it's also often the basis of the yellow color in fireworks.
What is sodium?
This point for a substance as a liquid is basically the same as the melting point for the same stuff as a solid.
What is the freezing point?
Why: Because blue frequencies of light are scattered more in the atmosphere than others.
Why is the sky blue?
Equal to the protons in its nucleus, this is 26 for iron.
What is the atomic number?
When this gloomy outlook follows "electro", it refers to the ability of an atom to attract electron pairs.
What is electronegativity?
The process of photosynthesis converts water & carbon dioxide into organic compounds & this gas.
What is oxygen?
The lowest possible temperature, -459,67 degrees Fahrenheit, is known as absolute this.
What is zero?
Sulfur dioxide emissions lead to this nasty atmospheric deposit.
What is acid rain?
It's the general term for a chemical process that converts a substance into a different one; give us your gut...
What is a reaction?
The main products of the alcoholic fermentation of sugar are ethanol & this gas.
What is carbon dioxide?
Sodium chloride is the chemical name for this mineral commonly used for seasoning food.
What is (table) salt?
If your mom says you have a fever with a body temperature of 39, she's using this scale.
What is celsius?
This precious metal & platinum are among the heaviest minerals, which is why they settle well in streams.
What is gold?
The fundamental unit of substance used in chemistry, it's 6.02 x 1023 atoms, not a garden pest
What is a mole?
Named for a German chemist, this tool seen here really turns up the heat.
What is a Bunsen burner?
The chemical elements are arrayed according to atomic number on this, a name indicating regular intervals.
What is the periodic table?
In the 1700s he developed the first practical mercury thermometer & the temperature scale that bears his name.
Who is Daniel Gabriel Fahrenheit?
H2O below 32 degrees Fahrenheit, it's considered a mineral if it's formed naturally.
What is ice?