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ThinkQuest
Webcytology was created for ThinkQuest 1999.
Quizzes

Elements and atoms

[go to this section in the Guide]
Chapter Two: The Chemistry of Biology


Question 1
 Matter is best defined as
   1.  specialized structures within cells
2.  a reaction between chemicals
3.  the "stuff" that everything is made of
4.  a type of cell
 

Question 2
 If you use chemical reactions to break down matter again and again until it cannot no longer be broken, then substance you now have must be
   1.  an electron
2.  hydrogen
3.  an element
4.  nothing, since matter can always be broken down by more chemical reactions
 

Question 3
 About how many elements have been discovered so far?
   1.  10
2.  100
3.  1000
4.  10000
 

Question 4
 The nucleus of all atoms is composed of
   1.  electrons and protons
2.  protons and neutrons
3.  electrons and neutrons
4.  electrons, protons, and neutrons
 

Question 5
 If an atom of a particular element has 15 protons and 16 neutrons, then its atomic mass is
   1.  1
2.  15
3.  16
4.  31
 

Question 6
 If an atom of a particular element has 11 protons and 12 neutrons, then its atomic number is
   1.  1
2.  11
3.  12
4.  23
 

Question 7
 An isotope of the element oxygen would have a different number of
   1.  neutrons than a normal oxygen atom
2.  protons than a normal oxygen atom
3.  electrons than a normal oxygen atom
4.  protons, neutrons, and electrons than a normal oxygen atom
 


 
 

ThinkQuest Team #27819 - 27819@for.net
Team: Andrew Kallem, Josh Tauberer
Coaches: Ms. Acerra, Mr. Kwitkin