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Atomic Structure and Periodic Table STUDY GUIDE
1. The net charge on a particle that consists of 12 protons, 12 neutrons and 10 electrons is____________
2. Which particle has about the same mass as that of a NEUTRON?_________________________
3. Which pair of symbols correctly represents two isotopes of COPPER?__________________
A.
29
Cu
and
60
B.
66
29
30
Cu
C.
60
Cu and
67
65
Cu
and
29
Cu
29
D.
66
29
65
Cu
29
Cu and
66
Cu
30
4. An atom of any electrically neutral element must have the same number of _________________ & ________________
5. What particles form the nucleus of an atom?________________ & _______________________
6. The identity of an element is determined by the number of _________________________
7. When a lithium (Li) atom becomes an ion(Li+), it:_________________________________________________
8. The number of the horizontal row of elements on the periodic table is the same as the number of: __________ ____________
9. Fill in the chart
GROUP/FAMILY TRENDS
columns
PERIOD TRENDS
rows
10.Define these terms: Electronegativity: __________________________________________________________
____________________________________________________________________________________________
Ionization energy ___________________________________________________________________________
___________________________________________________________________________________________
Atomic radius _____________________________________________________________________________
___________________________________________________________________________________________
NAME _________________________________________________ PERIOD ______ SCORE ______/10
11. NAME AND GIVE CHARACTERISTICS OF EACH FAMILY BELOW.
FAMILY
NAME
CHARACTERISTICS
NUMBER
1
2
3-12
Different number of outer electrons, and
17
18
12. Write the oxidation number and charge for the families 1-2-13-14-15-16-17-18
13. List the number of valence electrons and the charges formed for the ions for the following atoms.
Strontium __________________
Oxygen ____________________________
Nitrogen _____________________
Chlorine _____________________________
14. Name the classification of elements found: to the left of the staircase _______________________
On the staircase _________________________ To the right of the staircase _______________
Read and answer questions below. Shielding effect: Decrease in attraction between electron and positive nucleus
due to the addition of energy levels, electrons further away from the nucleus have less attraction to the positive
nucleus. Atoms and ions get bigger as you go down the columns because the shielding effect outweighs the effects of
the nuclear charge, so the attraction between the nucleus and electrons is weaker and the atom expands in size. In
contrast, atoms get smaller as you go across the periods because the nuclear charge effect outweighs the shielding
effect, so the attraction between the nucleus and the electron is greater and the atom shrinks in size. Shielding actually
reduces ionization energy. Electrons form shells around an atomic nucleus. The inner electrons shells shield the outer
electrons shells and reduce the effect of the nuclear "pull" on those outer electrons. The shielding provided by the inner
electrons means it will take less energy to free outer electrons from their orbitals, and thus the ionization energy of an
outer electron is reduced by the effects of shielding.
Write true or false for each statement.
_____15. Ionization energy increases across a period because of shielding.
____ 16. Atomic radii decreases across a period because of shielding.
____17. Atomic radii increases down a family because of shielding.
_____18.Ionization energy decreases down a family because of shielding.
_____19. New protons are added as atomic number increases in a period, therefore this increases the attractive force
between the nucleus and the electrons making the atomic radii decrease.
20. Circle which atom has the larger atomic radius of the pair: a. Cs and Li
b. Ne and F
c. O and Po
True or False: If false, write the correct answer.
______21.The modern periodic table arranges elements by atomic mass.
______22. There are 9 periods on the periodic table.
______23. There are 8 labeled groups on the periodic table.
______24. There are 2 elements in the first period of the periodic table.
______25. The alkaline earth metals are the second family of elements.
NAME _________________________________________________ PERIOD ______ SCORE ______/10
NAME _________________________________________________ PERIOD ______ SCORE ______/10