test questions

Question 1

how does bohr model explain the different atomic emission spectrum observed for different elements? Why does it not explain the spectrum for elements that have more than one electron?

Answer 1

• shows energy that is released by electrons when they move energy levels from being excited in the form of rings called orbitals
• does not explain it for element w more than one electron because they have energy levels that overlap so the energy emitted goes over each other and gives many different coloured lines

Question 2

Rutherford

Answer 2

planetary model

Question 3

Chadwick

Answer 3

discovered neutron

Question 4

Thomson

Answer 4

discovered electron

Question 5

Dalton

Answer 5

theory of atoms

Question 6

Heisenberg

Answer 6

uncertainty principle - cannot know electrons position and momentum at the same time

Question 7

Broglie

Answer 7

light has particle like properties

Question 8

Schrodinger

Answer 8

electrons have wave like properties

Question 9

orbital

Answer 9

region near nucleus where electron has a high probability of being found

Question 10

what causes metal to be dimagnetic?

Answer 10

lacks lone pairs in orbitals so materials repel due to lack of magnetism

Question 11

what causes metal to be ferromagnetic?

Answer 11

strong attraction due to cooperative alignment of electron spins

Question 12

what causes metal to be paramagnetic?

Answer 12

few unpaired electrons causing weak but measurable magnetism