How many of the following sets represent Dobereiner's triads? text i. P,As,Bi text ii. Ca,Sr,Ba text iii. Cl,Br,I text iv. Li,Na,K

Question

How many of the following sets represent Dobereiner's triads? text i. P,As,Bi text ii. Ca,Sr,Ba text iii. Cl,Br,I text iv. Li,Na,K (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

According to Dobereiner, the middle element have an atomic mass almost the average of the other two elements. Sets ii,iii and iv satisfy this conditions and hence, they represent Dobereiner's triads.

Q. How many of the following sets represent Dobereiner's triads?
$i. P, A s, B i$
$ii. C a, S r, B a$
$iii. Cl, B r, I$
$iv. L i, N a, K$

According to Dobereiner, the middle element have an atomic mass almost the average of the other two elements. Sets $ii, iii$ and $i v$ satisfy this conditions and hence, they represent Dobereiner's triads.

Q. How many of the following sets represent Dobereiner's triads? i. P,As,Bi ii. Ca,Sr,Ba iii. Cl,Br,I iv. Li,Na,K

According to Dobereiner, the middle element have an atomic mass almost the average of the other two elements. Sets ii,iii and iv satisfy this conditions and hence, they represent Dobereiner's triads.

Q. How many of the following sets represent Dobereiner's triads?
$i. P, A s, B i$
$ii. C a, S r, B a$
$iii. Cl, B r, I$
$iv. L i, N a, K$

According to Dobereiner, the middle element have an atomic mass almost the average of the other two elements. Sets $ii, iii$ and $i v$ satisfy this conditions and hence, they represent Dobereiner's triads.