Atomic Radius
What is atomic radius?
What is: The SIZE of the atom.
Fill in the blank: Ionization energy is the amount of energy needed to ____ electrons.
What is: remove
The most reactive Alkali Metal is?
What is: Francium
Atoms that form cations by losing electrons and have a positive charge are located where on the Periodic Table?
The Left Side where the metals are.
Which elements are unreactive and why?
Noble Gases because they have a complete valence shell with 8 electrons.
Which atom has the smaller atomic radii?
Na or F
F, moving across the periodic table the size decreases.
When a metal has higher ionization energy, reactivity is ___?
What is: lower
What type of elements have properties of both metals and nonmetals?
What is the stairsteps, the metalloids
How many electrons would alkaline earth metals lose to become stable?
What is 2.
How can you determine the number of valence electron?
Look at the periodic table and the group number will tell you. If you are in group 15 you have 5 valence electrons.
What is the trend for atomic radius?
Across the periodic table atoms get smaller, down the column atoms get bigger.
Which group of elements has the highest ionization energy?
What are: Noble Gases because they are not reactive and hold onto all of their electrons.
The most extremely reactive nonmetals are the group/family/column?
What are halogens.
Would aluminum gain or lose electrons to become stable? How many?
What is lose 3.
Period 5 has how many energy levels?
5
True or False: Ionization energy and atomic radius trends are the same?
False, the trend for atomic radius is opposite of Electronegativity and Ionization Energy
Which atom has a lower ionization energy?
Al, B, Cu, or Rb
What is: Rb because ionization energy increases across and decreases as you go down the column.
Name the group where the element with the electron configuration 1s22s22p63s2 is found
Alkaline Earth Metals
Explain why sodium is more reactive than calcium.
Sodium is more reactive because it only has one valence electron and calcium has two. It takes more energy to lose 2 electrons.
Which element has the highest electronegativity?
What is: Fluorine.
Down the PT: Which atom has a larger radius, Barium or Calcium and why?
What is: Barium because it is lower on the PT following the trend and has more energy levels.
Manganese is in the same group as Zirconium, which one has higher Ionization energy and why?
Manganese has higher Ionization energy because the energy decreases going down the PT.
Nonmetals, like Sulfur _____ electrons and therefore forms _____?
What is gain, anions. Nonmetals are mostly gaseous, dull looking solids. They have increased Ionization levels and decreased Atomic Radii.
How many electrons would phosphorus gain to become stable?
3
How many valence electrons does the element with this electron configuration have? 1s22s22p63s23p5
Look at the largest coefficients and add the superscripts 3s23p5
2+5 =7