Twenty Questions Subject The Periodic Table Twenty Questions
Twenty Questions Subject: The Periodic Table
Twenty Questions 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
1. Moving from left to right across a row of the periodic table, which of the values increases by one from element to element? l Atomic number
2. What are most metals at room temperature? l Solids
3. True or False: Most metals are brittle. l False
4. What class do the tin, copper and cesium fall under (metals, nonmetals or metalloids)? l Metals
5. Who developed the periodic chart? l Dmitri Mendeleev
6. As you move from left to right across a period, what happens to the number of valence electrons? l Increases
7. How many valence electrons does Boron have? l three
8. How many valence electrons does nitrogen have? l five
9. What is the only metal that is liquid at room temperature? l mercury
10. What family of elements have a complete valance energy shell? l Noble Gases
11. What family of elements has one valance electron? l Alkali metals
12. True or False: Nonmetals tend to gain electrons to form cations? l False: anions
13. Which element has a similar property to Nitrogen? Carbon, Oxygen or Phosphorus l Phosphorus
14. What is the most inactive group of elements? l Noble gases
15. How can an element become stable? l By gaining or losing electrons to fill the energy level
16. Which of the elements are a metalloid? Antimony, carbon, tin l Antimony
17. What do the numbers at the top of each group represent? (ex: 1 A, 2 A) l The number of valence electrons
18. What class of elements is a good semi-conductor ? l Metalloid
19. Elements F and I have the same number of what? l Valance electrons
20. Give the atomic #, # of valence electrons, family and period # for Be. l l Atomic # 4 2 valence electrons Alkaline Earth Metals 2 period #
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