L2 atoms, compounds and chemical bonding

Question 1

rutherford - bohr model
energy levels

Answer 1

energy levels are quantised and movement of an electron from one orbital to another leads to absorption or emission of electromagnetic radiation.

Question 2

principal quantum number

Answer 2

average distance of electron from nucleus

Question 3

orbital quantum number

Answer 3

shape of orbital

Question 4

magnetic quantum number

Answer 4

orientation of orbitals in space

Question 5

spin quantum number

Answer 5

direction of electron spin in magnetic fields

Question 6

how do you calculate orbital energy level

Answer 6

principal quantum level + orbital quantum number

Question 6

hund’s rule

Answer 6

degenerate orbitals are partially filled before any orbital is completely filled

Question 7

valency

Answer 7

how many bonds an element can form

Question 8

electronegativity required for covalent and ionic bonding

Answer 8

> 1.7 = ionic
<0.7 = covalent

Question 9

what is a pi bond

Answer 9

adjacent crossing over of p orbitals

Question 10

resonance

Answer 10

when a compound can be represented in more than one lewis structure and the actual structure is a hybrid of the structures

Question 11

hackle’s rule

Answer 11

any planar ring molecule with (4n+2)pi electrons is aromatic