Twenty Questions 12345 678910 1112131415 1617181920.

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Presentation transcript:

Twenty Questions

1. Moving from left to right across a row of the periodic table, which of the values increases by one from element to element? Atomic number

2. What are most metals at room temperature? Solids

3. True or False: Most metals are brittle. False

4. What class do the tin, copper and cesium fall under (metals, nonmetals or metalloids)? Metals

5.Who developed the periodic chart? Dmitri Mendeleev

6. As you move from left to right across a period, what happens to the number of valence electrons? Increases

7. How many valence electrons does Boron have? three

8. How many valence electrons does nitrogen have? five

9. What is the only metal that is liquid at room temperature? mercury

10. What family of elements have a complete valance energy shell? Noble Gases

11. What family of elements has one valance electron? Alkali metals

12. True or False: Nonmetals tend to gain electrons to form cations? False: anions

13. Which element has a similar property to Nitrogen? Carbon, Oxygen or Phosphorus Phosphorus

14. What is the most inactive group of elements? Noble gases

15. How can an element become stable? By gaining or losing electrons to fill the energy level

16. Which of the elements are a metalloid? Antimony, carbon, tin Antimony

17. What do the numbers at the top of each group represent? (ex: 1A, 2A) The number of valence electrons

18. What class of elements is a good semi-conductor ? Metalloid

19. Elements F and I have the same number of what? Valance electrons

20. Give the atomic #, # of valence electrons, family and period # for Be. Atomic # 4 2 valence electrons Alkaline Earth Metals 2 period #