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ESC102 Periodic Table Worksheet
NAME___________________________
All known matter is made of the elements contained within the Periodic Table of Elements.
The elements are arranged by the orderly configuration of protons and electrons in atoms.
The table provided gives atomic mass as a whole number. The complete unrounded atomic weight can be found at
http://education.jlab.org/itselemental/index.html
Find the elements: For each element, give the Atomic number and symbol, unless the questions asks for something
else. For example, the element Carbon has Atomic number 6 and symbol C.
1. What element must have a single proton and no neutron in the nucleus? _____________________
At# / symbol
2. Put the elements uranium, iron, and lead in order from lowest atomic mass to highest. Include the atomic mass.
(remember to use the atomic number and symbol for each)
__________________
___________________ __________________
At# / symbol / mass
At# / symbol / mass
At# / symbol / mass
3. Find five elements that are noted to have radioactive isotopes: Note the symbol for radioactivity.
__________ _
__________
__________
At# / symbol
At# / symbol
At# / symbol
4. How many protons are contained in an atom of oxygen?
__________
__________
At# / symbol
__________
At# / symbol
5. Find potassium. What is the atomic #? ______ atomic mass? ______ # of neutrons? _____
6. In an electrically neutral carbon atom, how many protons are present? ____ how many electrons? _____
7. The elements in the far right column, group 8 or VIII, are considered stable in terms of bonding.
Name the radioactive element in group 8. _______ How many neutrons are in the nucleus? ________
What is the ratio of neutrons to protons in the nucleus to nearest tenth? (divide #N / #P) _________
Bonus: Are all atoms with this ratio considered to be radioactive? ________ (if no, must give example)
8. Matter occurs in three phases at earth’s surface. (solid, liquid, gas) Most elements are solid at room
temperature. There are exceptions.
Find three elements not in column VIII that are gas at room temperature: _______ _______ _______
Find one element that is liquid at room temperature: ________
(At# / symbol)
9. How many artificially made elements are shown on this table? (see key for symbol) _______
How many of these are radioactive? _______
What does this reveal about the stability of the element (can it exist on Earth’s surface)?
10. The elements near the top and toward the right of the periodic table are most likely to share electrons
(bond) or react with other substances. Exclude column VIII.
Besides 7N (nitrogen, which has strong bonds that limit reactivity), name two solids and two gases that
are probably highly reactive:
_______
_______
_______
________
11. Go to: http://en.wikipedia.org/wiki/File:Elemental_abundances.svg
Look at the graph figure and find the cluster of elements shaded as “rock forming minerals”. These are in earth’s
crust in relatively high abundances. List the elements in this area of the graph that are in the first 3 rows of the
periodic table. Use the atomic number and element symbol.____________________________________________
For practice look at the Element Math Games at http://education.jlab.org/elementmath/index.html