Periodic Table Practice Problems
Terms in this set (98)
What is the trend in atomic radius as elements are considered from top to bottom within a family?
The closer it is to the bottom, the larger the radius.
Are there any reasons to explain the changes in radius between the different periods?
The more protons, the stronger the pull, makes the radius smaller.
What is the trend in atomic radius as elements are considered from left to right within a period?
Atomic radius decreases from left to right
What is the trend of ionization energy in a periodic table?
From left to right it increase
From top to bottom it decreases
Where are the most atomic metals located?
Where are the most active nonmetals located?
As you go from left to right, the atomic size...
Decreases because an increase in protons cause the nucleus to pull electrons
Pas you travel down a group, the atomic size...
Increase because energy levels increase
A negative ion is (larger/smaller) than its parent atom
A positive ion is (larger/smaller) than its parent atom
As you go from left to right across a period, the first ionization energy generally (decreases/increases)
Increases because the smaller the Atom the harder it is to remove electrons nonmetals want to gain
As you go down a group, the first ionization energy generally (decreases/increases)
Decreases because the outer electrons in the higher energy levels are more easily removed
Where is the highest electronegativity found?
Where is the lowest electronegativity found?
Elements of group 1 are called
Elements of group 2 are called
Alkaline earth metals
Elements of group 3-12 are called
As you go from left to right across the periodic table, the elements go from (metals/nonmetals) to (metals/nonmetals)
Metals to nonmetals
Group 17 elements are called
The most active element in group 17 is
Group 18 elements are called
What sublevels are filling across the transition elements?
F block and d block
Elements within a group have a similar number of...
Elements across a series have the same number of...
A colored ion generally indicates a...
As you go down a group, the elements generally become (more/less) metallic?
The majority of elements in the periodic table are (metals/nonmetals)
Elements in the periodic table are arranged according to their...
An element with both metallic and nonmetallic properties is called a...
In the modern periodic table, the elements are arranged in order of increasing...
More than 2/3 of the elements of the periodic table are classified as...
An atom of an element has 28 innermost electrons & 7 outermost electrons. In which period of the periodic table is this element located?
Elements in period 3 are alike in that they all have the same number of...
Occupied principal energy levels
In period 2, as the elements are considered from left to right, there is a decrease in...
As elements of group 15 of the periodic table are considered in order from top to bottom, the metallic character of the atoms of each successive element generally...
Which halogen has the least attraction for electrons?
Which element has the properties of electrical conductivity and luster and exists as a liquid at stp?
Which element is malleable and ductile?
Which part of the periodic table contains elements with the strongest metallic properties?
At stp, which substance is the best conductor of electricity?
At stp which of the following elements has the most metallic character?
A characteristic of most nonmetallic solids is that they are...
Which element is period 2 of the periodic table is the most reactive nonmetal?
All isotopes of which element in group 16 are naturally radioactive?
Which element is so active chemically that it occurs naturally only in compounds?
What is the total number of electrons found in the valence shell of a halogen in the ground state?
Which group contains elements in the three phases of matter at stp?
Which represents the electron configuration of a metalloid in the ground state?
Beryllium is classified as...
A noble gas
Which halogen is solid at stp?
Which of the following group 17 elements has the highest melting point?
Which electron configuration represents the first two elements in group 17?
2-7 and 2-8
Which noble gas would most likely form a compound with fluorine?
An atom in the ground state contains 8 valence electrons. This atom is classified as a...
Which elements form ions that are usually colored in solid compounds and in solution?
The properties of silicon are characteristics of...
Both metal and a nonmetal
Which metal is a liquid at stp?
Which period contains elements that are all gases at stp?
The atomic number of a metalloid in period 4 is...
Within a period, the element with the lowest first ionization energy is found in group...
The increase in atomic radius of each successive element within a group is primarily due to an increase in the number of...
Principal energy levels
The element found in group 13 and in period 2 is...
Elements that have the same properties of both metals and nonmetals are called...
According to the modern periodic table, the chemical properties of elements are periodic functions of their...
Two properties of most nonmetals are...
High ionization energy and poor electrical conductivity
Atoms of metallic elements tend to...
Lose electrons and form positive ions
What is the best example of a metalloid?
Which element exhibits both metallic and nonmetallic properties?
Which period contains 3 elements that commonly exist as diatomic molecules at stp?
Elements in the same period all have the same number of...
Energy levels/occupied sublevels
The element in period 3 with the most metallic character is...
Within a period as atomic number increases ionization energy generally...
Within a period, as atomic number increases, the number of valence electrons...
Within a period, as atomic number increases, electrical conductivity in the solid state generally...
As elements of period 2 with the largest atomic radius is...
An alkali metal
As the elements of period 2 are considered from left to right, there is a decrease in...
The s-2 ion differs from the s-0 atom in that the s-2 ion has a...
Larger radius and more electrons
One reason that fluorine has a higher ionization energy than oxygen is that fluorine has a...
Larger nucleus charge
A property of most nonmetals in the solid state is that they are...
In the periodic table, elements in the same group or column have similar...
Valence electrons configurations
In the periodic table, elements in the same period or row have the same...
Number of occupied principal energy levels
Where are the semi metals found? What are the exceptions?
Found under the staircase
Exception: At Al Po
Why are the noble gases called monatomic molecules?
They are found in nature, and don't combine with other atoms. They also have a complete valence shell.
Seven diatomic molecules
Br I N Cl H O F
Which two pure elements exist as liquids at stp?
Hg & Br
What are the gases?
N O F Cl and the noble gases
What is trend of metallic character based on the placement of metals on the periodic table?
They are found bottom left of periodic table. From left to right it decrease. From top to bottom it increases. They are to the left of the staircase.
What is nuclear charge and the trend within a group and within a period?
It is the number of protons. It increases.
What is covalent radius and how is it measured for each element?
It is the distance from the proton to the nucleus. If an atom loses an electron radius decreases, vice versa. It's measured from the middle to the valence shells.
Why does covalent atomic radius increase down a group and decrease across a period?
It decreases because there are more shells. It increases because protons are added making the pull increase.
How does the size of a negative ion (nonmetal) compare to the atom of the same element?
Negative ions gain electrons which makes them bigger.
Why are positive ions (metals) smaller than the atom of the same element?
Positive ions lose electrons which makes them smaller in size.
What is electronegativity?
The desire to gain electrons
What is ionization energy?
The energy required to remove the outermost electron
Why is electronegativity scales based on the element fluorine?
Fluorine has the highest electronegativity which is a 4.0
What is the trend in ionization down a group?
Decreases going down a group because the radius is bigger and its easier to lose those electrons
Why do metals have low ionization energy and low electronegativity?
Low ionization because they don't require a lot of energy to lose electrons. Low electronegativity because they lose electrons.
Why do noble gases have a high ionization energy but no electronegativity values?
Hight ionization because they have 8 valence electrons. No electronegativity because they don't gain any electrons.