The present organization of the elements is a product of the first periodic table published by Dmitri Mendeleev in 1869.  Today, the periodic law states that the properties of the elements are periodic functions of their atomic numbers.  Each of the elements has its own set of characteristic properties.  These range from solid to gas, lustrous to dull, low to high melting points, various colors, and so on.  The elements are arranged into groups or families and periods or series based on these properties.  This arrangement reflects the periodic or repeating nature of the properties of the elements.

In this exercise, you will use your knowledge of periodic properties and a list of clues to arrange the main group (representative) elements into a periodic table.  Use the clues below to arrange the letters A - Z into their appropriate positions in the grid of the periodic table provided.  (Please note that the letters A - Z in no way correspond to the real symbols for these elements.)

The following elements belong together in groups (not necessarily in this order):
    BFT        DGLZ        JNV        CMS        QXY        AEO        IPH        UKWR

Use the following clues to determine which group each set of elements belongs to:
1.) G is a noble gas.
2.) U is an alkali metal.
3.) E has 5 electrons in its outermost energy level.
4.) N has 2 valence electrons.
5.) T has an outer electron configuration of 4s2 4p1.
6.) Q is a halogen.
7.) C has a valence electron configuration of 2s2 2p4.

Use these clues to determine where each element is placed within each group.
8.) W is a gas at room temperature.
9.) F has the smallest atomic mass in its group.
10.) P has the lowest ionization energy in its family.
11.) Atoms of Z has a total of 2 electrons.
12.) Atoms of D contain 10 protons.
13.) The electrons of atom G are distributed over three energy levels.
14.) H is the least metallic element in its group.
15.) The atomic mass of V is less than that of J, but more than that of N.
16.) J has a lower ionization energy than V, but a higher ionization energy than K.
17.) The atomic number of R is one greater than that of Z.
18.) Y is a liquid at room temperature.
19.) The atomic radius of M is greater than that of S.
20.) A is more metallic than either O or E.
21.) Atoms of K are larger than those of U.
22.) T is more metallic than B.
23.) X has an atomic number that is one less than that of G.
24.) E is a gas at room temperature.

Link to the blank puzzle to put your answers on

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