WorksheetsKULIAH WEEK 3: ATOMIC STRUCTURE
Total questions: 6
Worksheet time: 6mins
Which of the following is NOT TRUE regarding Bohr postulates?
Electrons can only move around the nucleus of an atom in a circular orbit.
Electrons absorb energy in discrete amounts as they move from one energy level to another.
Specific amount of energy corresponds to a definite energy level for the electrons.
Electron at excited state was unstable, its only can fall back to n=1 and released a photon.
Calculate the energy of hydrogen atom at n= 2. Given RH= 2.18 x 10-18.
-8.72 x10-18 J
5.45 x10-19 J
-5.45 x10-19 J
-1.09 x10-18 J
Choose a line that represent the second line in Balmer series.
A
B
C
D
Which line represent the third line in Paschen series?
n=4 to n=3
n=6 to n=2
n=6 to n=3
n=5 to n=2
When an electron of hydrogen atom fall to n=1, it will formed a line spectrum in ________.
Lyman series
Balmer series
Paschen series
Pfund series
Draw a line spectrum that represent 2nd line in Balmer series.
