Question

which obeys the law of triads- Cl,Br,I or H,O,N or Na,Ne,Ca or Cl,O,Br?

Answer 1

Answer:

cl, Br, I

Explanation:

hey mate here is your answer:

dobereinr's triad: the arithmetic mean of masses of first and third elements is equal to atomic mass of the middle element.

let's check it by option wise:

1. Cl, Br, I

arithmetic mean of masses of Cl and I:

mass of cl=35.5

mass of I=127

arithmetic mean of masses of cl and I=

35.5+127/2

=162.5/2

=81.2

mass of Br=81.25

.:cl, Br, I obeys dobereiners triad

2. H,O,N

arithmetic mean of masses of H and N=

mass of H=1

mass of N=14

arithmetic mean of masses of H and N=

1+14/2

15/2

7.5

mass of O=16

.: H,O,N did'nt obey the law of triads

3.Na,Ne,Ca

arcl,Oithmetic mean of masses of Na and Ca:

mass of Na:23

mass of Ca=40

arithmetic mean of masses of Na and Ca:

23+40/2

73/2

36.5

mass of Ne=20

.:Na, Ne, Ca does"nt obey law of triads

4.Cl,O,Br

arithmetic mean of masses of cl and Br:

mass of cl=35.5

mass of Br=81.5

arithmetic mean of masses of cl and Br:

35.5+81.5/2

117/2

58.5

mass of O=16

.:cl, O, Br does'nt obey law of triads