Download SCH3U Periodic Table Worksheet 1. Where are the most active

SCH3U
Periodic Table Worksheet
1. Where are the most active metals located? Group 1. Also, the bottom periods of the
periodic table.
2. Where are the most active non-metals located? Top right of the periodic table.
Fluorine being the highest. Group 17 very reactive.
3. As you go from left to right across a period, the atomic radius
(increases/decreases). Why? Decreases. More positively charged protons in the
nucleus pulling electrons in closer.
4. As you travel down a group, the atomic radius (increases/decreases). Why?
Increases. Adding extra shells – the inner shells shield the pull from the nucleus, thus
making the radius larger and larger.
5. A negative ion is (larger/smaller) than its parent atom.
6. A positive ion is (larger/smaller) than its parent atom.
7. As you go from left to right across a period, the first ionization energy generally
(increases/decreases). Why? Increases. The increased proton pull from the nucleus
(seen in a smaller electron radius), requires more and more energy to remove an
electron.
8. As you travel down a group, the first ionization energy generally
(increases/decreases). Why? As you go down a group, the atomic radius increases as
the proton pull from the nucleus gets shielded with the addition of more electron shells.
This decreases the hold on the outer electrons, which therefore require less energy to be
removed.
9. Where is the highest electronegative ion found? Flourine – top right.
10. Where is the lowest electronegative ion found? Bottom left.
11. Elements of Group 1 are called Alkali metals.
12. Elements of Group 2 are called Alkali earth metals.
13. Elements of Groups 3-12 are called transition metals.
14. As you go from left to right across the periodic table, the elements go from
(metals/non-metals) to (metals/non-metals).
15. Elements of group 17 are called halogens.
16. The most active element in group 17 is fluorine.
17. Elements of group 18 are called noble gases.
18. What sublevels are filling across the Transition Metals?
19. Elements within a group have a similar number of valence electrons.
20. Elements across a period have the same number of electron shells.
21. A coloured ion generally indicates a
22. As you go down a group, the elements generally become (more/less) metallic.
23. The majority of elements in the periodic table are (metals/non-metals).
24. Elements in the periodic table are arranged according to their atomic number.
25. An element with both metallic and non-metallic properties is called a metalloid.