digital.wwnorton.com Smartwork5 The Four Most Abundant Elements By Mass In The H

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digital.wwnorton.com Smartwork5 The Four Most Abundant Elements By Mass In The Hum... Chegg.com HW11 86% ema0006@mix.wvu.edu 11/05/17 Part 2 (1point) ? See Hint Oxygen, carbon, and nitrogen are among the most abundant elements in the human body. Calcium and magnesium are also present in smaller but significant quantities. Based only on periodic trends, rank these elements in order of increasing atomic radius. Question List (5 items) (Drag and drop into the appropriate area) No more items Correct Answer List 25,30 > 23 OF 30 QUESTIONS COMPLETED + VIEW SOLUTION SUBMIT ANSWER

Explanation / Answer

rule 1: atomic size increases as we move down the group in periodic table

rule 2: atomic size decreases as we move from left to right in a period

C,N,O is in period 2

Mg is in period 3

Ca is in period 4

from rule 1:

Ca > Mg > C or N or O

from left to right in periodic table C,N and O appear as

C,N,O

So, from rule 2

C>N>O

So,

final order is

O < N < C < Mg < Ca

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