Chemical Properties of Periodic Table Elements: True or False Statements

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Discussion Overview

The discussion revolves around evaluating the truthfulness of various statements regarding the chemical properties of elements in the periodic table. It includes claims about ionic compounds, molecular compounds, and the properties of specific elements based on their positions in the periodic table.

Discussion Character

  • Homework-related
  • Debate/contested

Main Points Raised

  • Post 1 presents a series of statements regarding chemical properties, with initial answers provided by the poster.
  • Post 2 questions the validity of statement d, suggesting it may be false.
  • Post 3 expresses uncertainty about the correctness of the other answers and seeks clarification on the abbreviation "IMO."
  • Post 4 reiterates the uncertainty and provides the meaning of "IMO" as "In My Opinion," while asserting that statement d is correct due to fluorine and chlorine being in the same group.
  • Post 5 seeks clarification on whether elements in the same group always share the same chemical properties and questions the correctness of statement f regarding the number of protons and electrons in an O2- ion.
  • Post 6 confirms that an O2- ion has 8 protons and 10 electrons, based on the atomic number of oxygen.

Areas of Agreement / Disagreement

Participants express disagreement regarding the truth of statement d, with some asserting it is false and others claiming it is true. There is also uncertainty about the correctness of other statements, particularly statement f.

Contextual Notes

Participants have not reached a consensus on the truth of several statements, and there are unresolved questions about the definitions and properties related to ionic and molecular compounds.

Who May Find This Useful

This discussion may be useful for students studying chemistry, particularly those focusing on the periodic table and chemical properties of elements.

chawki
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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
 
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Why do you think d is false?

The rest is correct IMO.
 
I'm not sure. are the other answers correct?
What do you mean by IMO?
 
chawki said:
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.
 
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?
 
8 protons and 10 electrons since the atomic number of oxygen is 8.
 

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