LETTER Writing - Rules and Tricks

Summarise the rules for writing of distribution of electrons in various shells for the first eighteen elements.

A person write 4 letters and addresses 4 envelopes. If the letters are placed in the envelopes at random, then the probability that all letters are not placed in the right envelopes, is a. 1/4 b. 11/24 c. 15/24 d. 23/24

A person write 4 letters and addresses 4 envelopes. If the letters are placed in the envelopes at random, then the probability that all letters are not placed in the right envelopes, is a. 1/4 b. 11/24 c. 15/24 d. 23/24

What is the Bohr-Bury scheme of electronic configuration? Write down the rules that are observed according to the scheme for writing the number of electrons in different energy levels or shells.

What are the rules for writing the formulae of compounds?

Astonishing table trick | important table trick | tables yaad karna sikhe | Table ko yaad karne ki magical trick

Boys and girls in a class are writing letters. There are twice as many girls as boys in the class, and each girl writes 3 more letters than each boy. If boys write 24 of the 90 total letters written by the class, how many letters does each boy write?

Ravi writes 5 letters and addresses 5 envelopes. If the letters are placed in the envelopes at random, then the probability that a least one letter goes into the wrong envelope is

The total number of words that can be made by writing the letters of the word PARAMETER no vowel is in between two consonants is

Define octet rule. Write its significance and limitations.