periodic table-trends (1 Viewer)

[zinc]

Can someone explain to me the trend of boiling point on the periodic table?

 

[undalay]

Details the patterns in the periodic table:
http://www.chemsoc.org/viselements/Pages/data/intro_patterns.html

For each period the melting point rises from Group 1 to Group 14, then falls to the lowest value at Group 18

 

[Danger]

BPs across a period increases to group 4 then decreases

 

[zinc]

Why does it increase and then decrease?

 

[undalay]

Change in bond types.

Metallic bonds -> stronger metallic bonds -> covalent network -> dispersion forces-> weaker dispersion forces.

 

[cccclaire]

we did this a bit today in chem. I have a periodic table with lines all over it =]

 

[sle3pe3bumz]

Is it me or is my school really quite fast as we finished the metals topic like 2 weeks ago and started with water right after. Although, we just finished our chem half yearly exams yesterday. It was hard though as we just started the topic and needed to revise over the metals & chemical earth topic. But yeah, where are your schools up to now ?

 

[Kujah]

Is it me or is my school really quite fast as we finished the metals topic like 2 weeks ago and started with water right after. Although, we just finished our chem half yearly exams yesterday. It was hard though as we just started the topic and needed to revise over the metals & chemical earth topic. But yeah, where are your schools up to now ?

Finished the Chemical Earth -11 weeks
Metals- 4 weeks

 

[cccclaire]

we took the whole of term one to do the first topic.
now we're trying to rush through metals

 

[sle3pe3bumz]

One term for the first topic is quite normal. Although teacher packed us with a few sheets on metals to do on the holidays so like yeahh.