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31. Among the alkali metals, cesium reacts more rapidly than sodium. This is because: A. cesium...

31. Among the alkali metals, cesium reacts more rapidly than sodium. This is because: A. cesium atoms have a higher nuclear charge than sodium atoms have. B. The valence electron in a cesium atom is at a greater average distance from the nucleus than is the case for a sodium atom. C. cesium atoms have a higher atomic weight than sodium atoms. D. cesium atoms have more electrons than sodium atoms. E. cesium atoms have more neutrons than sodium atoms. explanation please

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Answer #1

electronic configuration of Cesium

1s22s22p63s23p63d104s24p64d105s25p66s1

where as for sodium elctronic configuration is 1s22s2sp6 3s1

The electronic configuration suggests that the outer electrnos are loosely bonded to the nucleus and can easilty be removed.

the configuration also suggests 78 neutrons for Cesium and sodium 12 neutrons

nuclear charge of cesium is +55 while that for sodium it is +9

all four are correct

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