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matter and periodic table
atomic structer and nuclear chemistry
bonding and chemical reactions
gases and thermochemistry
solutions
100
physical change changes the the way somthing looks chemical change changes the make up of somthing.
What is the differince between chemical and physical change
100
4 2He
What is symbole for the alpha partical
100
New substances are produced as existing bonds.
What happens during a chemical reaction?
100
an air like fluid substance witch exspands freely to fill any space availible.
What is a gas
100
consistes of a liquid with substance dissolved in it.
What is a solution
200
chemical
What is bread rising chemical or physical
200
more energy
compare to chemical reactions nuclear reactions produce?
200
We know that molecular orbitals are formed by overlapping of atomic orbitals. This model uses the molecular orbital approach.
What is Band Model of the Metallic Bonding?
200
gas equations.
What is a gas law
200
aquis solution
What type of solution is water
300
group 8
What is noble gases group
300
hellium
an alpha particle is essentially a ____ nucleus
300
We know that combined wave function is given as: Ψ AB = Ψcovalent + λΨionic The percent ionic character is given by: [λ2/(1 + λ2)] X 100 Therefore, 20 = 100*[λ2/(1 + λ2)] 20 + 20 λ2 = 100λ2 20 = 100λ2 – 20λ2 20 = 80λ2 Therefore, λ2 = 20/80
Assuming that the ionic character in H―Br bond is 20 percent. Calculate the fraction of the contribution of the ionic character to the valence bond wave function.
300
40
if a 40.1 g piece of iron at 652 is dropped into a sample of 328 g of water will the final temperture be after thermal equilibrium is established. assume that no heat is lost.
300
the amount of solute in the solvant
What is concintrate
400
minerals and salts
What are halogens
400
small amounts of mass are converted to large amounts of energy.
What happens in nuclear reaction
400
Chemical reaction
What is a tree catching on fire by a lightning strike? chemical or physical reactions?
400
gases
What is free moving atoms in the air?
400
both
is milk a solute or solvent?
500
increases as you move down the periodic table.
ionic radius trend
500
repulsive forces between protons.
very large nuclei tend to be unstable becouse of the?
500
physical
What happens when a car is dented chemical or physical reaction?
500
boyles law shows that at constante temperature the product of an ideal gas's and pressure and volume is always constant.
What is boyles law
500
yes
does the tempurture effact the solubility of a liquide?