Chemistry

1

1/X^a

Less than one or greater than 10

Between 1-10

• Multiply (needs) Add (exponents)
• When multiplying numbers with exponents, add the exponents.

Subtract the exponents

• Shortest Number Extreme Left
• Us for Multiplication and Division

1/X^-a

• Make them match and bring them down
• Make exponents match by choosing one number to remain the same, manipulate the other accordingly. Final answer will have shared exponent.

• Shortest Number After Decimal
• Use with adding and subtracting exponent number
• 1) Determine Shortes # (Beads)
• 2) Draw the lin after the decimal equal to the # of beads
• 3) Round as needed

• If it is Odd- ADD (Round UP)
• If it is Even- L'Even (Do Nothing)

• Do all steps as usual
• Determine SNEL based on all numbers in final answer- choose shortest
• Complete SNEL on final answer
• Do not include any certain numbers (Whole #)

• (a)= (b)/c
• Direct Relationship--> across from each other, seperated by =
• Move together

• (A)= B/(C)
• Indirect Relationship
• Move opposite

• Logical Arithmatic
• Exoponent

( ), X^x, X, /, +, -

• Does not rely on size of sample
• Color, Ratios, Temperatures

Repeats self in a predictable manner

Alkali Metals

Alkali Earth Metals

Halogen

• Rare Inert Noble Gases
• (RIN)

Groups

Period

• Atomic Number
• Whole Numbers (Integers)
• Number of protons and electrons

• Atomic Mass Number
• Average of all isotopes

To left of Staircase

To right of stair case

• On the staircase (but not in front of)
• Sometimes acts like and resembles a metal

• Based on electorns in outermost shell
• # of electorns in outermost shell is stated by Group Number (1 in 1, 2 in 2, etc.)

• How radius is measured
• 10^-12

• I will bond with someone if I can get 8 Electrons in my outer most shell.
• 1A bonds with 7A
• 2A bonds with 6A
• 8A does not bond as it is complete (NOBLE gases)

• How to determine the number of electrons on each ring
• Ne- Group 8A
• 8 rings
• Ring 1: 2(1)²= 2 electrons
• Ring 2: 2(2)²= 8 electrons
• Ring 3: 2(3)²= 18 electrons

• Sharing Electrons
• Weaker bond
• California

• Very strong
• Opposit charges attract like magnets
• Transfering of electrons (stealing electrons)
• Brooklyn Bonding

• Run in Greek
• Change in balance of electrons and protons

Atoms having same atomic # but different mass # because they have a different # of neutrons in the nucleus.

+ charged

• Electron leaves, becomes positively chargedmes positively charged
• Smaller than an atom

• (-) charged
• Gain an Electron
• Larger than an atom

Buffer the destructive properties of protons and electrons.

(Atomic Mass Number) - (Atomic Number)= number of Neutrons

• 1) Multiply mass # by weighted percentage (must all add up to 100)
• 2) Add the mass numbers (result of multiplication)
• 3) Divide total by 100
• 4) Perform SNEL on final number

6.02x10²³

2 bonds and 2 lone pairs

• Digets recordered in measurement (certain or uncertain)
• 0 before decimal point are significant
• 0 are NOT significant without decimal point

How close measurments are in a series to one another

How close a measurement is to actual value

Independent structure consisting of 2 or more atoms chemically bound together

matter composed of 2 or more elements that are chemically bound

• M
• 10⁶

• k
• 10³

• c
• 10^-2

• m
• 10^-3

• 1 gram
• grams/ mole= amu
• measurement of chemicical protions

• u
• 10^-6

• amu added up
• example: CO₂= 12+(2x16)=44.0g/mole