electron configuration

Question 1

How are electrons organised in an atom ?

Answer 1

electrons are organised in energy levels

Question 2

depending on how far the energy levels are from the nucleus, what will they have thats different from eachother ?

Answer 2

they will have different energies depending on how far away they are from the nucleus

Question 3

which electron shell has the least amount of energy ?

Answer 3

1

Question 4

which one has the most amount of energy ?

Answer 4

the one with the most amount of electrons possible

Question 5

electrons in different shells have… ?

Answer 5

different amounts of energy

Question 6

what are the different sub levels/ shells ?

Answer 6

s, p, d sub levels

Question 7

what sub levels are there in the 2nd energy level ?

Answer 7

s and p

Question 8

what sub levels are on the 3rd energy level ?

Answer 8

s, p and d

Question 9

what is the maximum of electros that the s orbital can hold ?

Answer 9

2

Question 10

what is the maximum of electros that the p orbital can hold ?

Answer 10

6

Question 11

what is the maximum of electros that the d orbital can hold ?

Answer 11

10

Question 12

what is the maximum of electros that the f orbital can hold ?

Answer 12

14

Question 13

what do electrons shells also have ?

Answer 13

subshells

Question 14

what does each sub level consist of ?

Answer 14

electron orbitals

Question 15

what is meant by an electron orbital ?

Answer 15

• region of space in which an electron spends most of its time

Question 16

what property do electrons have ?

Answer 16

they have the property of spin

Question 17

how many electrons can each orbital hold ?

Answer 17

each orbital can hold 2 electrons with opposite spins

Question 18

what is meant by electrons with opposite spins ?

Answer 18

when one electron spins anticlockwise and one electron spins clockwise

Question 19

which sub level is lower energy than the 3d sub level ?

Answer 19

4s

Question 20

in what order will the electrons fill the energy levels ?

Answer 20

electrons will fill the lowest available energy level

Question 21

what are the 3 steps of putting electrons in their place ?

Answer 21

1. fill lower energy level first
2. fill each orbital first with 1 electron before pairing them up
3. there is a maximum of 2 electrons per orbital

Question 22

why should you fill the lower energy levels first ?

Answer 22

because they are more stable

Question 23

what is meant by an orbital ?

Answer 23

orbitals are regions of space that electrons are most likely to be in

Question 24

how many orbitals do s sub levels have ?

Answer 24

1

Question 25

how many orbitals do p sub levels have ?

Answer 25

3

Question 26

how many orbitals do d sub levels have ?

Answer 26

5

Question 27

how many orbitals do f sub levels have ?

Answer 27

7

Question 28

draw an energy level diagram

Answer 28

picture on phone or on worksheet

Question 29

what does it mean if an element is from the s block ?

Answer 29

the outer electron is found in the s sub shell

Question 30

what does it mean if an element is from the p block ?

Answer 30

the outer electron is found in the p sub shell

Question 31

what is the electron configuration rule for transition metals ?

Answer 31

• fill the 4s before the 3d
• in ions, remove 4s before 3d

Question 31

what are the 2 exceptions to the transition metal configuration rule ?

Answer 31

Cr = 3d5 4s1 NOT 3d4 4s2
and Cu = 3d10 4s1 NOT 3d9 4s2

Question 32

why are cu and cr the 2 exceptions for transition metal configuration ?

Answer 32

because they become more stable this way as they have more stability