Transcript Twenty Questions

Twenty Questions
Subject: The Periodic Table
Twenty Questions
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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 #