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The Elements (Grade 8)

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The Elements

1. 
The basic building blocks of elements are called
  1. eons
  2. silica tetrahedra
  3. minerals
  4. atoms
 
2. 
Isotopes are atoms of the same element with the same number of protons and
  1. a different number of electrons
  2. a different number of molecules
  3. a different number of neutrons
  4. the same number of neutrons
3. 
All the following elements are metals except:
  1. C
  2. Ca
  3. Cs
  4. Cu
 
4. 
Copper is a chemical element with the atomic number of
  1. 25
  2. 26
  3. 27
  4. 28
  5. 29
5. 
This is a metallic element that reacts violently with water.
  1. copper
  2. iron
  3. silver
  4. sodium
 
6. 
There are                 valence electrons in an atom of carbon.
  1. 1
  2. 4
  3. 0
  4. 1,000
7. 
Which element is a colorless gas of low mass that is rarely found uncombined?
  1. sodium
  2. carbon
  3. hydrogen
  4. oxygen
 
8. 
Except for helium, this expresses the stability of a noble-gas atom's filled outer energy level:
  1. the duet rule
  2. the octet rule
  3. the sextet rule
  4. the trio rule
9. 
Which one of these elements are NOT part of the Noble gases family?
  1. Helium
  2. Oxygen
  3. Argon
  4. Neon
 
10. 
Which gas is monatomic at STP?
  1. chlorine
  2. fluorine
  3. neon
  4. nitrogen
11. 
Which is an element?
  1. [math]H_2O[/math]
  2. [math]NaCl[/math]
  3. [math]KCl[/math]
  4. [math]Na[/math]
 
12. 
If potassium is in Group 1A, how many electrons do you expect to see in its Lewis Dot structure?
  1. one
  2. two
  3. three
  4. four
13. 
Which element is an example of a rare earth element?
  1. Magnesium
  2. Calcium
  3. Sodium
  4. Uranium
 
14. 
How many valence electrons does an atom of bromine have?
  1. one
  2. four
  3. seven
  4. eight
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