History
Organization
Ions
Trends
Metal, Metalloid, or Nonmetal?
This and That
100
What class of element is found in Group III, Series 4?
Metallic
100
Which of the following will be a brittle solid that does not conduct heat or electricity?
Na Al Si S
S
100
What is the total number of electrons in a fluoride ion (F-) ?
10 electrons
100
Which element has the lower electronegativity?
Si or Cl?
Si has the lower electronegativity
100
Si
Metalloid
100
Which element would be likely to have an ion that produces a solution with a bright color?
Ca Cu Br
Cu
Transition metals often have ions that produce colorful solutions.
200
What is one property that Mendeleev used to identify and place the elements in this table?
Increasing atomic mass
Oxide formula
200
What is the trend in atomic structure as you move down a group?
There is an increase in the number of PELs and shielding as you move down a group.
200
What is the total number of electrons in a magnesium ion?
10 electrons
200
Which element will have the smallest radius?
C, N, O, F
F will have the smallest radius.
200
Al
Metal
200
What are two forms of an element with different molecular structures called?
Allotropes
300
What is the most active metal in this table?
Cs
Cesium
300
What is the oxidation number for the metal in an oxide with the formula MO2?
+4
300
What is the Noble Gas that has the same configuration as the bromine ion?
Kr, Krypton
300
Which has the most metallic character?
C N O F
Carbon, C
300
Kr
Nonmetal
300
Compare the atomic radius and the nonmetallic character of P and Cl.
P has a larger radius and less nonmetallic character.
400
What is the oxidation number of elements in group VI?
+6
400
Which of the following is an unreactive element?
P S Cl Ar
Ar: Group 18- Noble Gases- Unreactive
400
What is the Noble Gas that has the same electron configuration as the potassium (K) ion?
Ar, Argon
400
How do the atomic radius and ionization energy of Li compare to the atomic radius and ionization energy of N?
Li has a larger radius and lower ionization energy than N.
400
Co
Metal
400
What class of element exhibits both metallic and nonmetallic properties?
The metalloids
500
What group is not represented in this table and why?
The table is based on reactivity, and group 18 elements (Noble Gases) do not react.
Group 18 is missing.
500
What is the trend in atomic structure across a period?
The #p+ increases (nuclear charge) which increases the nuclear attraction for electrons
(the number of energy levels (PELs) stays the same)
500
Is the the oxygen ion larger or smaller than an atom of oxygen?
Larger! Adding electrons causes the radius expand.
500
Which is the most active nonmetal?
P S Cl Ar
Cl, chlorine
500
C
Nonmetal
500
An element with seven valence electrons and an electronegativity greater than bromine could be
Kr Se I F
F, flourine