Electrons In Energy Levels

Question 1

What are quantum shells and how are they labelled

Answer 1

Where electrons are grouped together, represented by n with n=1 being closest to the nucleus

Question 2

How many electrons can each quantum shell hold

Answer 2

-1 can hold 2 electrons
-2 can hold 8 electrons
-3 can hold 18 electrons
-4 can hold 32 electrons

Question 3

What is an orbital

Answer 3

Region in space around the nucleus of an atom where there is a 95% chance of finding an electron or a pair of electrons with opposite spins

Question 4

How many orbitals found in an s subshell and what shape is it

Answer 4

1 orbital found, sphere shape

Question 5

How many orbitals in p subshell and what shape

Answer 5

3 orbitals and is shape of a dumbbell

Question 6

How many orbitals in a d subshell

Answer 6

5 orbitals

Question 7

How many orbitals in an f subshell

Answer 7

7 orbitals

Question 8

Three rules which determine electron arrangement in atoms(aufbau principle)

Answer 8

-electrons go into orbital with lowest available energy level first
-each orbital can only contain at most two electrons(w opposite spins)
-orbitals fill up singly before electrons pair up

Question 9

What does electronic configuration of an element describe

Answer 9

The number and arrangement of electrons in an atom of an element

Question 10

Shortened form of electronic configuration

Answer 10

Use symbol of previous noble gas in square brackets as inner shells

Question 11

Electronic configuration up to 4p

Answer 11

1s2,2s2,2p6,3s2,3p6,4s2,3d10,4p6