Rank the following elements in order of decreasing atomic radius: Mg, Na, P, Si, Ar.
a. Mg, Na, P, Si, Ar
b. Si, P, Ar, Na, Mg
c. Ar, Si, P, Na, Mg
d. Na, Mg, Si, P, Ar
2006-12-17 10:08:41 · 4 answers · asked by bosox1989 1 in Science & Mathematics ➔ Chemistry
Na(1.57), Mg(1.36), Si(1.17) P(1.10), Ar(.94)
answer is D
2006-12-17 10:20:50 · answer #1 · answered by mr man 2 · 0⤊ 0⤋
They all belong to the third period. In a period the atomic radius decreases from left to right. Na belongs to the IA group, Mg to the IIA group, Si to the iVA group , P to the VA group and Ar to the VIIA group, so: Na < Mg < Si < P < Ar
The right answer is (d).
2006-12-17 10:32:20 · answer #2 · answered by Dimos F 4 · 0⤊ 0⤋
Look them up in www.Wikipedia.org
2006-12-17 10:09:44 · answer #3 · answered by arbiter007 6 · 0⤊ 0⤋
DBAC ?!
2006-12-17 10:10:59 · answer #4 · answered by Anonymous · 0⤊ 0⤋