Chemistry - Review (Electron Configurations, Periodic Table, Etc..)
Each period in the periodic table corresponds to.....
A principal energy level.
Of the following statements, which has the smallest first ionization energy out of boron, carbon, aluminum, and silicon?
Aluminum.
Which of the following factors contributes to the increase in ionization energy from left to right across a period?
An increase in the number of protons.
One half of the distance between the nuclei of two atoms when the atoms are a joint....
Atomic radius.
What causes the shielding effect to remain constant across a period?
Electrons are added to the same principal energy level.
Subatomic particles that are transferred to form positive and negative ions.....
Electrons.
What is the element with the highest electronegativity value out of cesium, helium, calcium, and fluorine?
Fluorine.
Vertical column in the periodic table...
Period.
A repetition of properties that occurs when elements are arranged in order of increasing atomic number.....
Periodic law.
What are the group 1a and group 7a elements examples of?
Representative elements.
What element has the electron configuration 1s2 2s2 2p6 3s2 3p2?
Silicon.
An element has an atomic number of 80. How many protons and electrons are in an atom of the element?
Since the element is mercury, there are 80 protons and 80 electrons, because the atomic number is 80.
For group 2a metals, which electron is the most difficult to remove?
The Third.
Which of the following is true about the electron configurations of the noble gases?
The highest occupied S & P sublevels are completely filled.
Which of the following is true about the electron configurations of the representative elements?
The highest occupied S & P sublevels are partially filled.
What is the charge of a cation?
The positive charge.
Which of the following correctly compares the relative size of an atom to its neutral atom?
The radius of an ion is greater than the radius of its neutral atom.
Type of element characterized by the presence of electrons in the d orbital...
Transition metal.
which of the following statements is not true about ions?
When a cation forms more electrons are transferred to it.
What is the electron configuration of oxygen?
1s2 2s2 2p4
What is the electron configuration of sulfur?
1s2 2s2 2p6 3s2 3p4
The S & P sublevels of an atom of an element in period 3 are filled with electrons. Which orbitals are filled in this atom?
1s2 2s2 2p6 3s2 3p6
Which of the following elements is in the same period as phosphorus?
Magnesium.
Which of the following elements out of sodium, calcium, potassium, and magnesium, has the smallest first ionization energy?
Potassium
The atomic number of an element is the total number of which particles in the nucleus?
Protons.
of the elements Fe, HG, you, in te, which is a representative element?
D.Te
Atomic size generally....
Decreases as you move from left to right across a period.
Who arranged the elements according to atomic mass and used the arrangement to predict the properties of missing elements?
Dmitri Mendeleev
Which subatomic particle plays the greatest part in determining the properties of an element?
Electron.
Which statement is true about electronegativity?
Electronegativity generally increases from left to right across the period.
The ability of an atom to attract electrons when the atom is in a compound....
Electronegativity.
Of the elements PT, V, Li, and KR, which is a non-metal?
Kr.
Which of the following has the smallest ionic radius?
Li
Which of the following elements has the lowest electronegativity out of lithium, carbon, bromine, and fluorine?
Lithium
What element in the second period has the largest atomic radius?
Lithium.
The metals in group 1a, 2a, and 3a...
Lose electrons when they form ions.
Type of element that is a good conductor of heat and electric currents....
Metal.
Which of the following categories includes the majority of the elements?
Metals.
Which of the following factors contributes to the increase in atomic size within a group in the periodic table as the atomic number increases?
More shooting of the electrons by the highest occupied energy level.
To what category of elements does an element belong if it is a poor conductor of electricity?
Nonmetals.
The modern periodic table is arranged in order of increasing atomic....
Number.
Which of the following electron configurations is most likely in an element that is relatively inactive?
One empty and one filled energy sublevel.
From which orbital in a lithium atom is an electron transfer to form Li+?
2s
What orbital is sealed when iodine gains an electron to become a negative ion?
5p
In which group in the periodic table do the elements have the highest electronegativity values?
7a
About what percent of elements is classified as metals?
80%
Which of the following groupings contains only representative elements?
C. al, mg, Li
In which of the following groups of ions are the charges are shown correctly?
CA 2, Al3, Br-
Type of ion formed by group 2a elements....
Cation.
Which of the following statements is true about ions?
Cations form when an atom loses electrons.
What is the element with the lowest electronegativity value out of cesium, helium, calcium, and fluorine?
Cesium.
Which of the following elements has the smallest atomic radius?
Chlorine.
Which of the following elements is a transition metal?
Copper.
Which group of elements in the periodic table is known as the alkali metals?
Group 1a
Which group in the periodic table is known as the noble gases?
Group 8a
what is another name for representative elements?
Group A elements.
What is another name for transition metals?
Group B elements.
Horizontal row in the periodic table..
Group.
Elements that are characterized by the feeling of p orbitals are classified as....
Groups 3a through 8a.
Comparing with the electronegativity of the elements on the left side of the., electronegativities of the elements on the right side of the same period tend to be...
Higher
In which of the following sets is the symbol of the element, the number of protons, and the number of electrons given correctly?
In, 49 protons, 49 electrons.
Which of the following factors contributes to the decrease in ionization energy within a group in the periodic table as the atomic number increases?
Increase in atomic size
What is the energy required to remove an electron from an atom in a gaseous state called?
Ionization energy
Which of the following decreases with increasing atomic number in group 2a?
Ionization energy
As you move from left to right across the second period of the periodic table....
Ionization energy increases.
Energy required to move an electron from an atom....
Ionization energy.
Why is the second ionization energy greater than the first ionization energy?
It is more difficult to remove the second electron from an atom.
How does the atomic radius change from left to right across a period in the periodic table?
It tends to decrease.
How does atomic radius change from top to bottom in a group in the periodic table?
It tends to increase.
In which of the following sets are the charges given correctly for all the ions?
K, SR 2, 02 negative
