Dive Chemistry Lesson 21

Alloy – a solid or liquid mixture of two or more metals
precision – how close a series of measurements are to one another.
Combined gas law – P1V1/T1 = P2V2/T2 Temp always in K
STP = standard temp (273 K) and standard pressure (1 atm or 101.3 kPa)
conversion factor – a ratio that is derived from the equality of two different units and that can be used to convert from one unit to the other
Malleable – Can be beaten flat
Beta decay – • mass stays same
• atomic number increases by 1
Tyndall effect – Light is scattered by colloidal particles dispersed in a transparent medium
Ionization Energy – Energy required to remove a single electron from a neutral atom

Increases from left to right (period)
Decreases from top to bottom (group)

When the equation below is balanced, the coefficient of oxygen is: Fe + O2 → Fe2O3
nucleus – the positively charged dense center of an atom
Extensive Property – A property that depends on the amount of matter in a sample.
ionic compound – compound made up of ions
what are the 7 diatomic? – h2(hydrogen) n2(nitrogen) o2(oxygen)f2 (fluorine) cl2 (chlorine) i2 (iodine) br2 (bromine)
gram-equivalent mass – The mass of one equivalent, expressed in grams.
Atomic Mass Equation – Remember you don't have to divide by 100 if the % is already converted to a decimal.
When the equаtiоn belоw is bаlаnced, the cоefficient of oxygen is: Fe + O2 → Fe2O3
angle for trigonal planar – 120
Oxidation reaction – a chemical reaction in which a reactant loses one or more electrons such that the reactant becomes more positive in charge
Analytical chemistry – The identification of the components and composition of materials
Atomic structures – What atoms are–>Made up of–>All atoms are–>composed of–>Up to 3 subatomic particles.

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