electron configuration

Question 1

where are electrons found

Answer 1

In energy levels aka orbitals/shells. split into sub levels with different maximum numbers of electrons

Question 2

Can electrons location be identified

Answer 2

no because one spins up and one spins down so they are constantly moving. the shape of the orbital shows where it can be found

Question 3

`what are the energy levels

Answer 3

1s 2s 2p 3s 3p 4s 3d

Question 4

why does 4s come before 3d

Answer 4

4s orbital is slightly lower than 3d

Question 5

what is the aufbau principle

Answer 5

electrons fill energy levels in order of increasing energy

Question 6

what is the Pauli exclusion principle

Answer 6

each orbital contains a maximum amount of electrons. it must have opposite spins. an arrow down and a arrow up.

Question 7

what is hunds rule

Answer 7

orbitals are occupied unpaired before paired

Question 8

define isoelectronic

Answer 8

atoms /ions with the same electronic configuration

Question 9

metals_______electrons_______ions

Answer 9

lose positive

Question 10

what is atomic mass

Answer 10

average mean mass of an at5om of the element compared to the 1/12th of the mass of a 12C atom