Unit 1a
What is a crucible used for
Melting substances
If someone gets hurt during a lab what should you do
Call for the teacher
What is volume
A cation has a positive charge and usually a solid, while anion have a negative charge and are usually liquid/gas.
The mole is the unit of measurement for amount of substance.
Convert 10m to feet
1 meter = 3.3 feet
33 feet
How many sig figs are in 3000000
1
What is an isotope?
An isotope is an element with the same number of protons but different number of neutrons.
What is this acid called: HF
Hydrofluoric Acid
What is Avogadro’s number
6.022x10^23
An explanation
What is the difference between a homogenous and heterogenous mixture
A heterogenous mixture has substances that can be picked out while a homogenous mixture has substances that are uniform and cannot be picked out
What is Hund’s rule?
Every orbital should be singly occupied before any orbital is doubly occupied.
Name all the prefixes for molecular compounds 1-12
Mono
Di
Tri
Tetra
Penta
Hexa
Hepta
Octa
Nona
Deca
Hendeca
Dodeca
What is the percent composition of Oxygen in H20
88.79%
Is brass a pure substance or mixture? Name the type of pure substance/mixture
Mixture, Homogenous
What is a meniscus and how does it affect your measuring.
A meniscus is the curve on the water in a container such as a graduated cylinder. Your measurements should be plus or minus the lowest unit on number measuring tool.
How many electrons can be in each sub level
S sub-level: 2
P sub-level: 6
D sub-level: 10
F sub-level: 14
Name the different types of molecular geometry.
Linear, Trigonal Planar, Trigonal Pyramidal, Tetrahedral, and Bent
How many liters are in a mole
22.4 liters
What is 22.5285 + 22.14 + 4.266 (Use significant zero rule)
48.93
Convert 5 gallons in milliliters:
1 gallon = 3.78541 L
1 liter - 1,000mL
18927.059 milliliters
Dalton: Atomic Ball model
JJ Thomson: Plum Pudding model, discovered protons
Rutherford: Negatively charged electron cloud
Bohr: Bohr Model
Chadwick: Discovered neutrons
What type of acid is the following: CH₃COOH
Acetic Acid
Convert 30g of HF to grams of SnF2 using this equation: Sn + 2HF ——> SnF2 + H2
117.47g SnF2