Using the "octet rule," write the lewis formulas for (a) scl2, (b) ccl4, (c) nf3 and (d) ch2c(ch3)2

Answer :

Octet rule : It is a general chemical rule. It states that every atom wants to have eight valence electrons in its valence shell.

The steps involved in the Lewis dot structure of given molecules are :

Total number of valence electrons in :

(a) = 20

(b) = 34

(c) = 26

(d) = 24

The image is shown below.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.