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Chemistry re-teach quiz
Con il contributo di: Jones
Chemistry re-teach quiz

1. Looking at slide number 1, which list of

 atoms are the least reactive?

A.  He, Ar, Ne

B.   F, Cl, Br

C.  Zn, Cd, Hg 

D.  C, Si, Ge

2.  Looking at slide number 1, which two

 families are the most reactive?

A.  numbers 1 and 8

B.  numbers 7 and 8

C.  numbers 1 and 7

D.  numbers 6 and 7 

3.  According to the law of the conservation of mass

how much CaCO3 will be collected?

B.   64g

A.  177g 

C.  113g

D.  241g

4.  If 50 grams of sodium and 75 grams of chlorine

chemically combine to form the substance

sodium chloride, according to the

law of the conservation of mass,

the mass of sodium chloride will be ____?

 2Na + Cl2

A.  125g

B.   25g 

C.  250g

D.  50g

 2NaCl
5.  Which subatomic particle(s) identify an element?

A.  atomic number

B.  protons

C.  neutrons

D.  sum of protons and neutrons

6.  How many total atoms are in the product

 of the equation above? 

A.  3 

B.  12

C.  8

D.  11

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