Name the elements with which even and odd series of 4th, 5th and 6th periods begin.Solution in Bengali

Mentnion two laws (for the (classification of elements), which were proposed before mendeleev.

(i) Write the name of the element which is diagonally related to the element beryllium.
(ii) Three element A, B and C have atomic numbers 11, 14 and 17 respectively. State the blocks in periodic table in which elements A and C belong to. Write the formulas of the compound formed between B and C and A and C. state the nature of the bonds.

The bond angle in $N{F}_3\left(102{.}^{\circ }\right)$ is smaller than $N{H}_3\left(107{.}^{\circ }\right)$. This is because-

(a) Find the oxidation numbr of C-1 and C-2 in $C{H}_{3}C{H}_{2}OH$.(b) What is the oxidation number of Mn when$MN{O}_2$ is melted with solid $KN{O}_3$ and NaOH?

In Pheretima, there are red coloured round bodies in 4th, 5th and 6th segments above the alimentary canal They are believed to be involved in

Total number of elements in 6th period are:

The number of elements in the 4th period of periodic table is

Number of elements present in 5th period is

ionisation potential decreases down the group in
representative elements while transition elements
of the 6th period have greater ionisation potential values compared to the elements of the 5th period. Justify.

Elements of the 4th, 5th and 6th period of mendeleev's periodic table were divided into even and odd series-why?

The number of elements in 5th and 6th period of periodic table are respectively

The ratio of the distance through which a body falls in 4th, 5th and 6th second is starting from rest

Number of elements in the 6th period

फेरीटिमा में आहारनाल के ऊपर चौथे, पाँचवे, छठवें खण्ड में लाल रंग की गोल संरचनाएं पाई जाती हैं , इनका सम्बन्ध होता है

Which element comes in 5th period of chalcogen group ?