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Chemistry CH 1 and 2
Terms in this set (39)
What a scientist sees
ex) Phosphorus burns bright white.
Summarizes past observations and predicts future ones
ex) In chemical reactions, matter is neither created nor destroyed.
Allows you to predict behavior and describe the underlying cause of physical behavior
ex) All matter is made of tiny, indestructible particles called atoms.
Only one type of atom or molecule
A pure substance containing only one kind of atom
A pure substance made up of two or more elements/molecules
A substance composed of two or more different types of atoms or molecules that can be combined in variable proportions
A solution mixed unevenly throughout the solution
A solution mixed evenly throughout the solution
No visible parts
Change that occurs when you only change the state of the substance, not the identity.
Change that occurs when a reaction occurs, and the chemical make up is changed
Describe the appearance of the type of matter
Extensive and intensive
Depends on the amount of a substance present
ex) mass and volume
Does not depend on the amount of a substance present
ex) density and boiling point
Property that a substance displays only through chemical change
ex) flammability of gasoline
Common Decimal Prefix Flashcards
Look at them
Celsius to Fahrenheit
(9/5)*T + 32
ex) 10C = 50 F
Avg. Atomic Mass
m1(Fractional Abundance 1) + m2(Fractional Abundance2)...
1)comprise most of the elements
2)Usually lose electrons when involved in chemical reactions
3)Good electrical and thermal conductors
1)Top right of periodic table
2)Usually gain electrons from metals and share electrons with nonmetals in a reaction
Metalloids, semi-metals, or semi-conductors
1)Can be a metal or nonmetal
2)Can be found in the region of the table between the metals and nonmetals
3)B, Si, Ge, As, Sb, and Te
Have special names because of the similarity of the chemical properties
1)Solid at room Temp.
2)React violently with water
Alkaline Earth Metals
1)Solid at room Temp.
2)React vigorously with oxygen
1)One gas at room Temp, while the rest are solid
1)Mostly gas at room Temp.
2)Forms salts when bonded to a metal
1)Mostly solid at room Temp.
2)Form complex ions
Name Elements 1-54
Look at periodic table
Have no fear of ice cold beer
H2, N2, F2, O2, I2, Cl2, Br2
Dalton's Atomic Theory of Matter
Look at page
Valence States for Ionic Compounds
Group 1: +1
Group 2: +2
Group 5: -3
Group 6: -2
Group 7: -1
The electrons in the outermost shell (main energy level) of an atom; these are the electrons involved in forming bonds.
Ionic Naming Rules
1) Metal(cation) goes first, then the nonmetal(anion)
2) Cation stays the same, anion uses the root of the nonmetal followed by -ide
3)Use roman numerals to describe the valence states of transition metals
Special Metal Names
Look at chart
Naming Hydrates(Prefix Flashcards)
Just like naming ionic compounds, but you add the common prefix and hydrate to indicate the amount of water in the compounds.
Covalent Naming Rules (AKA Molecular Naming)
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