What subatomic particles are involved when elements combine to form compounds?
The outermost (valence) electrons
(accept electrons)
100
If you know the oxidation number of both ions in a compound, how can you determine the correct formula?
Use the charge of each ion as the subscript for the other ion. (crossover method)
100
What elements on the periodic table do not react with any other elements?
No element in group 18, the noble gases, will react with any other element
100
How many molecules are represented by 3Pb(NO3)2
three (the coefficient at the start of the molecule)
100
What is the difference between a cation and an anion?
A cation is positive and an anion is negative
200
What two types of elements form ionic bonds?
Metals with nonmetals
200
If the atomic number of an element is given, how can the oxidation number be determined?
Find its group. All elements in the group will have the same oxidation number
200
What happens to the chemical properties of the original compounds when chemical bonding occurs?
New properties appear
200
How can you determine that an ionic compound is written correctly?
Multiply the charge and subscript of the cation and multiply the charge and subscript of the anion then add the two numbers together. They will equal zero (neutral)
200
Name the six elements in the noble gas family
He, Ne, Ar, Kr, Xe, Rn
300
Will nitrogen and Chlorine form an ionic bond?
No, they are both nonmetals
300
What is the oxidation number of an ion with 26 protons, 30 neutrons, and 24 electrons?
26 protons - 24 electrons = +2
300
Which has lower ionization numbers: Metals or nonmetals?
Metals
300
Diatomic elements are gases that form molecules with themselves. Name the seven diatomic elements.
Hydrogen, Nitrogen, Florine, Oxygen, Iodine, Chlorine, and Bromine
300
What do roman numerals mean when they follow an element name?
Roman numerals tell the oxidation number (charge) of a transition metal
400
What subatomic particle determine the number of bonds that an atom will form?
The outermost (valence) electrons
(accept electrons)
400
If you know the charge of an ion in a compound, how can you determine the charge of the other ion or polyatomic ion?
Multiply the known charge with the subscript of that ion and divide by the subscript of the other ion.
400
A solid ionic compound does not conduct electricity. How can you make an ionic solid conduct electricity? (two ways)
Melt to form a liquid or dissolve in water
400
Given a chemical formula in an equation, how is the number of molecules represented?
The coefficient (number in front of the formula) tells the number of molecules
400
describe a polyatomic ion
A covalent unit of two or more nonmetals with a charge that acts as the anion in an ionic compound.
500
What are four ways that electrons can form chemical bonds?
Sharing, Transferring, Losing, gaining
500
What is the best method for determining the correct subscripts when writing an ionic formula?
Use the crossover method. The oxidation number (charge) becomes the subscript for the opposite element or poly-atomic.
500
define ionization energy
The amount of energy to remove or transfer a valence electron
500
How do the electron and the proton numbers change when an ion becomes positive? (two part answer)
protons remain the same, the valence electrons(s) are transferred (lost) to another atom. (electron number is reduced)
500
What two subatomic particle numbers will tell you the name and the charge of an ion?
Number of protons tells you the name and the number of protons minus the number of electrons will give you the charge.