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Valence Electrons
Compounds
Forming Ions
Cations or Anions?
Potpourri
100
The number of valence electrons found in the metal in the 4th period and has 20 total electrons.
What is 2?
100
This is the name of a compound that results from a pairing between element 11 and element 17.
What is sodium chloride?
100
The Group 1A elements will all form ions with this charge.
What is +1?
100
Nonmetals are likely to form this type of ion.
What is an anion?
100
This is the phase of matter that occurs after melting.
What is liquid?
200
All noble gases will have this many valence electrons.
What is 8?
200
In order to form an ionic compound, a metal must be paired with this.
What is a nonmetal?
200
This set of elements has complex rules to predict ion formation.
What are the transition metals?
200
Cations lose electrons easily because of this periodic trend.
What is low ionization energy or low electron affinity?
200
The molecular mass of water.
What is 18.02 g/mol?
300
The rules regarding prediction of valence electrons do not apply for this section of elements.
What are the transition metals?
300
This is the chemical formula for strontium arsenide.
What is Sr3As2?
300
This set of elements will most likely not form ions due to their stability.
What are the noble gases?
300
This member of Group VIA would never form an anion.
What is polonium?
300
Sugar has 6 carbons, 12 hydrogens, and 6 oxygens in each molecule. This is the number of moles in 346.0 g of sugar.
What is 1.920 moles? (sig figs matter)
400
One can predict the number of valence electrons for the "A" group elements using this feature of the periodic table.
What is the group number?
400
Using a manganese (IV) ion, manganese selenide has this chemical formula.
What is MnSe2?
400
The halogens will form ions with this charge.
What is -1?
400
Lead and carbon are in the same group, but form different types of ions because lead is one of these.
What is a metal?
400
This element is in the 6th period and has an f orbital that is half full.
What is europium?
500
A metal is expected to do this with its valence electrons when it forms a cation.
What is losing the valence electrons?
500
Gallium carbide has this chemical formula.
What is Ga4C3?
500
If a molecule of a version of manganese oxide contains 7 oxygen atoms, this is the charge of the manganese ion.
What is +7?
500
Members of this group will only form anions.
What is Group VIIA or Group 17?
500
Rutherford's experiment with gold foil concluded this fundamental property of atoms.
What is a small, dense nucleus surrounded by electrons?