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Rank the following elements by increasing atomic radius: carbon, aluminum, oxygen, and potassium
oxygen, carbon, aluminum, potassium
Rank the following elements by increasing electronegativity: sulfur, oxygen, and aluminum.
aluminum, sulfur, oxygen
Define Atomic Radius
the distance between the nuclei of two identical atoms bonded together.
What is the trend of Atomic Radius?
Trend: Decreases from left to right across a period.
Increases from top to bottom within a group.
Define Ionization Energy
the amount of energy needed to remove an electron from an atom.
What is the trend for Ionization Energy?
Trend: Increases as we go up a group.
Increases from left to right across the periodic table.
Arrange the following in order of increasing electronegativity: W, Pb, Ba, Po
Ba, W, Pb, Po
Which element is more electronegative: P or K? Why?
P. Increasing electronegativity.
Which has a larger atomic radius? Rb or Na Why?
Rb. Increased atomic radii.
What is the element with the smallest atomic radius: Au W S Fr Ne
Fr
What is the element with the lowest ionization energy: Au W S Fr Ne
Fr
What is the element with the lowest electronegativity: Pb C Sn Si
Pb
Give THREE examples of ions.
Na+, Cl-, K+
Define Isotopes.
have the same atomic number (# of protons), but different mass numbers because different NEUTRONS.
Define Valence Electrons.
Valence electrons are the outer-shell electrons of an atom.
Valence electrons determine the reactivity of an atom.
How many valence electrons does F (fluorine) have?
7
