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Periodic Trends Assignment
Part A
Using colours and/or shading, Indicate the following: โ Label Hydrogen โ Location of the metals, metalloids, non-metals โ The following families: alkali metals, alkaline earth metals, transition metals, halogens, noble gases, lanthanides (rare earth metals), and actinides โ Label the groups I to VIII Be sure to include a key, if necessary.
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Part B
Indicate the following trends on the periodic table below. You may use arrows, diagrams, differences in shading and/or symbols. Be sure to include a key, if necessary. For each property indicate changes 1) across a period AND
- within a group โ Atomic Radius โ Ionization Energy โ Electron Affinity โ Electronegativity โ Reactivity in a group of non-metals โ Reactivity in a group of metals
Part C
Using your knowledge of atomic radius, electronegativity, and ionization energy explain fully the trends in reactivity in metals and non-metals. This should be done on a separate piece of paper and be approximately ยฝ page to a page in length.
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4. Explain why this trend occurs.
5. Ionization energy is the amount of energy required to remove an electron from an element. Using the ionization
energies of the elements in Period 2 listed below, make a line graph the values vs. atomic number. Period 2 Element IE (kJ/mole) Element IE (kJ/mole) Li 519 N 1406 Be 900 O 1314 B 799 F 1682 C 1088 Ne 2080
6. On the same graph, make a line graph the first three atoms in Group 2A listed below in a different color.
Group 2A Element IE (kJ/mole) Be 900 Mg 736 Ca 590 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
7. What trend do you notice for the ionization energies in Period 2?
8. What trend do you notice for the ionization energies of Group 2A?
9. Explain why this trend occurs.
Ioni zati on Ene rgy Atomic Number
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10. For each of the following, circle or highlight the correct element that best matches the statement on the right.
Li Si S metal N P As smallest ionization energy K Ca Sc largest atomic mass S Cl Ar member of the halogen family Al Si P greatest electron affinity Ga Al Si largest atomic radius V Nb Ta largest atomic number Te I Xe member of noble gases Si Ge Sn 4 energy levels Li Be B member of alkali metals As Se Br 6 valence electrons H Li Na nonmetal Hg Tl Pb member of transition metals Pb Bi Po metalloid B C N gas at room temperature
