What is during a double-replacement reaction, a compound is formed that is insoluble and comes out of solution in solid form.
100
The reason chemical equations must be balanced
What is Law of Conservation of Mass
100
Number of electrons that can be held in the d sublevel
What is 10
100
The charge of an aluminum ion
What is 3+
200
Isotope I has a mass of 45.0045 amu and is 96.05% abundant.
Isotope II has a mass of 49.443 amu and is 3.95% abundant.
The average atomic mass is:
What is 45.180 amu
200
Why the activity series is used
What is to determine if reactions will occur. Elements cna replace elements below them but not above them.
200
Differece between molecular and ionic compounds
What is molecular: shares electrons to bond / ionic: bonds with + / - charges from ions.
200
Number of electrons that can be held by an orbital.
What is 2
200
The reason some metals have roman numerals in their formulas
What is they form more than one ion - the roman numeral tells you which ion it is
300
U-238 emits an alpha particle to form:
What is 234
Th
90
300
The products of a combustion reaction
What is carbon dioxide and water.
300
Reaction type: A + BC -> AC + B
What is single replacement
300
List from lowest to highest EMR: microwave, gamma ray, radio waves, infrared, ultraviolet
What is radio, microwave, infrared, ultraviolet, gamma
300
If two elements from the same group bond, the bond is (ionic/molecular)
What is molecular
400
Rutherford's gold foil experiment determined:
What is that most mass of an atom is concentrated in the nucleus.
400
Reaction: A + B -> AB
What is synthesis or combination
400
Reaction type: AB -> A+B
What is decomposition?
400
When an electron is given energy to go to a higher energy level, and then drops back down to it's original energy level, what happens to the energy?
What is given off as light.
400
Noble gas configuration of Lithium
What is [He] 2s1
500
Thomson's cathode ray tube experiment determined:
What is the charge of an electron.
500
What are the products of a double-replacement reaction?
What is 2 compounds
500
C = wavelength * frequency = the relationship between wavelength is (directly or indirectly proportional)
What is indirectly?
500
A compound is formed from an element from the right side of the periodic table and one from the left side. Is this compound most likely ionic or molecular?