Electrons and the Periodic Table
1.
Name _________________
What is a valence electron?_______________________________________________
_____________________________________________________________________
2.
How many energy levels do the atoms of each of the following elements have?
Li _______
Ca _______
3.
4.
Si _______
Pm _______
Au _______
U _______
Fr_______
He _______
How many valence electrons do each of the following atoms have?
Ca _______
Pb _______
Br _______
P _______
K _______
He _______
O _______
Al _______
Which element has atoms with...
seven valence electrons in the fourth energy level?_________
two valence electrons in the seventh energy level?__________
four valence electrons in the third energy level?___________
one valence electrons in the sixth energy level?___________
five valence electrons in the fourth energy level?__________
eight valence electrons in the fifth energy level?__________
5.
What is ionization energy? _______________________________________________________
_______________________________________________________________________________
6.
In each of the following pairs tell which atom would be the hardest to remove an electron from:
Li
or K ________
Sn or Te________
7.
Mg or Cl________
O or Cs ________
Ne or Rn________
S or K ________
Why does ionization energy increase as you go from left to right across the periodic table?
_____________________________________________________________________________
______________________________________________________________________________
8.
Why does ionization energy decrease as you go down the periodic table?
________________________________________________________________________________
________________________________________________________________________________
9.
In each of the following pairs tell which atom would have the largest radius:
Li
10.
or K ________
Mg or Cl________ O or Cs ________
S or K ________
Why do atoms get bigger as you go down the periodic table? _____________________________
______________________________________________________________________________
11.
Why do atoms get smaller as you go from left to right on the periodic table?
______________________________________________________________________________
Identify each of the following as either: alkali metal, alkaline earth metal, halogen, or noble gas
12.
A colorful gas that burns your eyes and throat: ________________________
13.
An atom with a valence configuration of s2:__________________________
14.
A colorless gas that won’t corrode metal, or sting your eyes: _______________________
15.
An element that has an unpaired s electron: _____________________
16.
Has an s2 p5 configuration: _______________________
Identify each of the following as a:
representative element, transition element, or an inner transition element
17.
Iron: ______________________________
18.
Sulfur: ______________________________
19.
Uranium: ____________________________
20.
An element with a partially filled f sublevel: ________________________
21.
An element with a partially filled d sublevel: ________________________
Which element has the following electron configuration
22. [Ar] 4s2 3d7 _______
23. [Rn] 7s2 5f6 _______
24. [Xe] 6s2 4f14 5d10 6p1 _______
For each of the following elements determine which ionization energy would be significantly higher than
those preceding it. Example: element: Ca answer: third
25. As: ____________
26. S: ____________
27. Al: ____________
Look at the ionizations energies below to answer 28 – 30
Element A
Element B
Element C
1st
801
248
786
2nd
1,427
656
1,580
3rd
3,660
9,340
3,230
4th
25,026
11,987
4,360
5th
32,827
14,255
16,100
28. How many valence electrons does each element have? A) _______
B) _______
C) _______
29. Which of the following elements might have the ionization energies listed for element A?
(circle one)
Li
Be
B
C
N
O
F
Ne
30. Which of the following elements might have the ionization energies listed for element C ? (circle one)
Na
Mg
Al
Si
P
S
Cl
Ar