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An __ has a pH of less than 7
Sodium hydroxide is a common __
Absolute __ is a theoretical state where a system has no energy
Metalloids like __, silicon, and arsenic can act like metals or non-metals
Something that does not have the ability to react is considered __
Helium, neon, argon, krypton, xenon and radon are __ gasses
Two or more elements make up a __ compound
Enthalpy is the measurement of __ in a system
__ is a measurement of temperature that starts at absolute zero
Mass is the amount of __ in a substance, usually recorded in grams
Lithium, sodium and potassium are alkali __
The Scientific __ is based on the experimental testing of hypotheses
__ is a measure of energy lost in a system
The more an object moves, the more __ energy it has
The number of __ in a nucleus is equal to that element's atomic number
__'s number is the number of particles in a mole of a substance
Something that speeds up a chemical reaction is called a __
__ is measured in force per unit of area
The movement of particles from areas of higher to lower concentration
A covalent bond is when two atoms share __
__ chemistry studies compounds that do not include carbon
Graphite and diamond are __ of carbon: same element, different form
An __ reaction absorbs heat, so it feels cold
A state of __ is reached when the forward and reverse actions are equal
An unstable atom may release __ emmissions
__ is when a solid turns directly into a gas
Dilution makes a solution less __, usually by adding a solvent
A __ __ shows the state of a substance at a temperature and pressure
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