Trends
The modern periodic table is arranged in order of
Increasing atomic number
Which of the following has the SMALLEST atomic radius: Sodium, Magnesium, Aluminum, Silicon
Silicon
Define Ionization Energy
The amount of energy needed to remove an electron from a neutral atom
What element is found in group 14, period 3?
Is it a metal, nonmetal, or metalloid?
Silicon
Metalloid
What is the common name of group IIA?
Alkaline Earth Metals
Dmitri Mendeleev classified elements according to their
Atomic mass or Atomic Weight
Which of the following is the LEAST electronegative: Sodium, Chlorine, Barium, Krypton
Barium
Which of the following is the MOST electronegative: Sodium, Magnesium, Aluminum, Phosphorous
Phosphorous
What separates the metals and nonmetals?
The stairs or ladder.
What is the common name of the first group of the periodic table?
Alkali metals
Describe the periodic trends of Ionization Energy down a group and across a period
Ionization Energy decreases down a group and increases along a period
Which of the following has the LARGEST atomic radius: Oxygen, Sulfur, Selenium, Tellurium
Tellurium
Which of the following has the SMALLEST ionization energy: Sodium, Magnesium, Potassium, Calcium
Potassium
Name 4 Properties of Nonmetals
Consists of only 1/3 of the periodic table
Has poor thermal and electrical conductivity
Has low melting and low boiling points
Located in the top right of the periodic table
Are brittle
Has high ionization energy
Has high electronegativity
Small atomic radius
What is the common name of the group who has complete electron shells and are generally nonreactive?
Noble Gases or Inert Gases
Describe the trends of Electronegativity down a group and across a period.
Electronegativity decreases down a group and increases across a period
What is the most electronegative atom and what is the its electronegativity?
Fluorine, 4.0
Which of the following has the LARGEST atomic radius: Nitrogen, Sulfur, Arsenic, Selenium
Arsenic
What groups of elements are not found by themselves in nature?
Group 1 - Akali Metals, group 2 - Akali Earth Metals, & Group 17 - Halides/Halogens
How are families named?
By the first element in the column or group
Describe the trend of Atomic Radius down a group and across a period
Atomic Radius increases down a group and decreases across a period
Why does the Atomic Radius of elements decrease as we move across the period?
What is it called and describe the process.
Due to Nuclear Charge: The charge of the nucleus is more positive, pulling the negatively charged electrons closer, thus, making the radius smaller.
If an element has [MORE OR LESS] ionization energy, it means that it it very difficult to remove electrons from the outer electron ring.
More
Describe the location of the metals, metalloids, and nonmetals.
Metalloids are found on the ladder/stairs -
Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium.
Metals are all of the elements to the bottom left of the ladder/stairs.
Nonmetals are all of the elements to the top right of the ladder/stairs.
What charge do the halogens have?
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