In the currently accepted model of the atom, where are electrons found?

Complete the sentences:
Each shell is given a number called the _____________ ___________ number. The further a shell is from the nucleus, the __________ its energy and the _________ its principle quantum number.

Describe the structure of electron shells

Up to how many electrons can one orbital hold?

What are the 4 types of sub-shell?

How many orbitals are in the s sub-shell (include the maximum number of electrons)?

How many orbitals are in the p sub-shell (include the maximum number of electrons)?

How many orbitals are in the d sub-shell (include the maximum number of electrons)?

How many orbitals are in the f sub-shell (include the maximum number of electrons)?

List the sub-shells in the first shell

List the sub-shells in the 2nd shell

List the sub-shells in the 3rd shell

List the sub-shells in the 4th shell

What is an orbital?

Complete the sentence:
Orbitals within the same sub-shell have the same _________. If there are ______ electrons in an orbital, the must have '______' in opposite directions (spin-pairing).

What is electron configuration?

What are the 3 ways in which electron configuration can be shown?

Describe the sub-shell notation

Describe the electrons in boxes notation

Describe the energy levels diagram notation

What are the rules for electron configurations?

TRUE OR FALSE:
When an element is ionised, the electrons are removed from the 3d sub-shell before the 4s sub-shell

Which two elements are the exceptions for the rules of electron configuration?

Why is copper an exception for the electron configuration rules?

Why is chromium an exception for the electron configuration rules?

What are shortened electron configurations?

How did the idea of sub-shells and orbital come about?

Scientists now think of orbitals as an area where electrons are most likely to be, rather than where they will definitely be. Why?