Ch 1 Flashcards
Observation
What you can see and notice
Hypothesis
Educated Guess
Experiment
a controlled way to test hypothesis
Conclusion
results of the experiment
States of Matter
Solid, Liquid, Gas
Which has definite Shape
Only Solid
Which has definite Volume
Liquid and Solid
Homogeneous vs Heterogeneous
Homogeneous you can’t see a difference Heterogeneous you can
Mixture vs Substance
Mixture is made up of substances, substances are made up of compounds
6.434 x 10^4
64340
.0004872
4.872 x 10^-4
3.24554 x 10^-9
00000000324554
Sig Figs in 4.09280
6
Sig Figs in 30980
4
Where is the Sig Fig? 365.4 + 2.375
Tens Place
Where is the Sig Fig? (45.23 + 21.3)/23.62
Tens Place
Giga
1000000000
Mega
1000000
Kilo
1000
Hecto
100
Deka
10
Base
1
Deci
.1
Centi
.01
Mili
.001
Micro
.000001
Nano
.000000001
Density Formula
g/ml = g/v
Kelvin to Celcius
C = K - 273.15
Celcius to Farenheit
F = (91.8 x C) + 32
Element
can not be chemically broken down
Molecule
same elements chemically combined
Compound
different elements chemically combined
Mixture
more than 1 pure substance
Pure Substance
an element or compound
Ion
a charged group of atoms
Cation vs Anion
cation positive charge, Anion negative charge
Noble Gases
Group 18
Transition Elements
Central Block, Group 3 - 12
Metals
Down and Left of Metalloids, not H
Non Metals
Up and Right of Metalloids
Metalloids
The steps, not Al
Alkali Metals
Group 1
Alkaline Earth Metals
Group 2
How to Remember Diatomic Molecules
Henry Never Brings Open Flames In Clorine
Diatomic Molecules
H2 N2 Br2 F2 I2 O2 Cl2
Formula for Aluminum 1 Bromine 3
AlBr3
Formula for Calcium 1 Flouride 2
CaF2
Which elements are present in CS2
Carbon and Sulfur
Which elements are present in ClF
Chlorine and Flouride
How many atoms in (NH4)2Cr2O7
N - 2, H - 8, Cr - 2, O - 7
What is Copper
Pure Substance, Element
What is Soda
Mixture
What is Aluminum Oxide
Pure Substance, Compound
Physical Properties
characteristics where composition stays the same
Chemical Properties
ability of a substance to form new ones
Physical Change
composition stays the same
Chemical Change
composition changes
Law of Conservation of Mass
Mass doesn’t change in chemical changes
Energy
capacity of Mass to do work
Potential Energy
stored energy
Kinetic Energy
energy of Matter to do motion
Calorie
amount of heat to change 1 g of water 1 degree C
Specific Heat
how much heat needed to change 1g of water 1 degree C
Law of Conservation of Energy
energy can’t be created or destroyed
Reactants
starting substance
Products
produced substance
Chemical Properties
Flammability, Decomposition, Reactivity
Equation for Heat Capacity
J = g x j/gC x (Cfinal - Cstart)
Neutron
not charged subatomic particle
Proton
positively charged subatomic particle
Electron
negatively charged subatomic particle
Nucleus
central atom
Isotopes
a number with different number of neutrons
Mass Number
number of neutrons + protons
Atomic Number
number of protons in the nucleus
Dalton’s Model
first model of the atom
What was Rutherford’s Hypotheisis
The particles would go straight through the gold foil
What did everyone else think?
The plum pudding experiment. Protons in the atom and electrons spread throughout. So all particles would bounce right back.
What happened in Rutherford’s experiment?
The particles went straight through, some bounced back and others veered off to the side
What did Rutherford Learn?
There was a small hard center in the middle, the nucleus. Most of the atom was just empty space. The nucleus was positively charged.
How was Rutherford’s Experiment Done?
Fired small positively charged subatomic particles at a piece of gold foil. There was a ring around the foil that would spark up every time the particle hit it. They used that to mark where the particles were going.
Sublevel is S tier
1 sublevel
Sublevel in P tier
3 sublevels
Sublevel in D tier
5 sublevels
Sublevel in F tier
7 sublevels