Q9 · 2021 · Paper 1Simple familiar1 mark
QUESTION 9
The Bohr atomic model describes an atom as
(A)
the smallest particle of any substance.
(B)
a small dense nucleus orbited by electrons.
(C)
electrons scattered throughout a sphere of positively charged fluid.
(D)
a small positive nucleus surrounded by negative electrons in set orbits of fixed energy.
WORKED SOLUTION
1 markAnswer D
ANSWER
D
Worked solution
The Bohr model places electrons in discrete, fixed-energy orbits around a small positive nucleus. Option D.
Selects option D.
Worked explanation by QCE Vault; correct option verified against the QCAA answer key.