Atomic Structure and Periodicity
GCE Chemistry
10 Atomic Structure and Periodicity practice questions covering everything you need for GCE.
Drill Atomic Structure and Periodicity →Sample Atomic Structure and Periodicity questions
a) State the Aufbau principle and use it to write the electronic configuration of the following elements: i) Calcium (Ca, Z = 20) ii) Iron (Fe, Z = 26) iii) Chlorine (Cl, Z = 17) b) i) Defin…
a) i) Explain what is meant by the term 'isotopes', giving TWO examples with their nuclide symbols. ii) Carbon has two stable isotopes: carbon-12 (abundance 98.89%) and carbon-13 (abundance 1.11%).…
The electronic configuration of an element is 1s² 2s² 2p⁶ 3s² 3p³. Which of the following correctly describes this element?
An element X has a mass number of 40 and 21 neutrons. The number of electrons in the X²⁺ ion is
The first ionization energies (in kJ mol⁻¹) of four successive elements in the same period are: 496, 738, 578, 786. Which of the elements has the lowest first ionization energy because it has a half-f…
Which of the following pairs of elements have the same number of neutrons?
The atomic radius generally decreases across a period from left to right because
How many orbitals are completely filled in an atom of calcium (Z = 20)?
An element M has the electronic configuration [Ar] 3d⁶ 4s². Which of the following statements about M is CORRECT?
Which of the following pairs of elements have the same number of neutrons?