Alloy - atoms arrangement

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[Announcements] [Introduce Yourself] [ICT] [Prasekolah] [LINUS] [KSSR] [UPSR] [PMR] [SPM] [STPM] [School] [Classroom] [Clubs & Uniformed Bodies] [JPN] [SPA] [SICT] [SPP] [SPS] [SPPK] [SPSPK] [SPI] [SPsK] [JNJK] [PPD] [Program] [Computer & Internet] [Let's Hear It From You] [Membergroup]

[Lim Tze Khai]

How to draw the atoms arrangement in stainless steel?

[Sim Thiam Huat]

I 'll draw 3 rows of iron atoms of the same size packed closely together as in the solid state. In the empty spaces between these iron atoms, put in a few smaller sized atoms to indicate the carbon atoms.

[Lim Tze Khai]

I agreed with your mr sim. this is due to the smaller size of carbon atom and at lower %.

[Wong Pei Funn]

I 'll draw 3 rows of iron atoms of the same size packed closely together as in the solid state. In the empty spaces between these iron atoms, put in a few smaller sized atoms to indicate the carbon atoms.

Cikgu Sim, How do we draw the atoms arrangement in Brass?Cu atom bigger than Zn atom or Zn atom bigger than Cu?

[Jong Kah Yin]

Draw copper atom bigger (and more) and zinc atom smaller (and less) - refer to the periodic table - the lower the position in the periodic table, the bigger the atomic size and across a period, the atomic size decreases.

[Sim Thiam Huat]

but brother and all, i surfed the net , copper has atomic radius of 128pm while zinc is 134pm. Anyway we are not expected t0 know up to this detail. .So i assume we just follow our periodic table concept of change of atomic size across the period. we just assume zinc is smaller, hence just draw more bigger sized atoms for copper and a few slightly smaller sized atoms indicating zinc would be nice.

[Wong Pei Funn]

Draw copper atom bigger (and more) and zinc atom smaller (and less) - refer to the periodic table - the lower the position in the periodic table, the bigger the atomic size and across a period, the atomic size decreases.

Mr. Jong& Mr. Sim..I agree with ur both explanation..Now i can teach my students to draw atoms arrangement of alloy confidently..TQ very much

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