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Choosing the right answer

  • Thread starter chawki
  • Start date
  • #1
510
0

Homework Statement


Read the statements a through f below, and decide which of them are true and which are false.

a) The ionic compounds contain only nonmetals.
b) Na2O and CaCl2 are molecular compounds.
c) Sulphur and chlorine have similar chemical properties because they are in the same period
of the periodic table.
d) Fluorine and chlorine, which are in the same group of the periodic table, have similar
chemical properties.
e) An Fe2+ ion has 26 protons and 24 electrons.
f) An O2- ion has 6 protons and 8 electrons.


Homework Equations


Indicate T or F

The Attempt at a Solution


a-F
b-F
c-F
d-F
e-T
f-F
 

Answers and Replies

  • #2
256
2
Why do you think d is false?

The rest is correct IMO.
 
  • #3
510
0
I'm not sure. are the other answers correct?
What do you mean by IMO?
 
  • #4
256
2
I'm not sure. are the other answers correct?
What do you mean by IMO?
In My Opinion :P

d is correct, F and Cl are in the same group (column, halogens in this case), so they have similar properties.
 
  • #5
510
0
Thank you, so i understand that the elements which are in the same group (class) have always the same chemical properties?!
Also in (f) O2- should have 8 protons and 8 electrons or 8protons and 10 elctrons?
 
  • #6
256
2
8 protons and 10 electrons since the atomic number of oxygen is 8.
 

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