Which element has the electronic configuration of noble gas notation [Kr] 5s2 4d2 :
Correct answer: C. Zr
- A. Se
- B. Sr
- C. Zr
- D. Mo
Explanation
The electronic configuration of Zirconium (Zr), which has an atomic number of 40, is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d². In noble gas notation, it can be written as [Kr] 5s² 4d². Zirconium is a transition metal. It is located in the fourth period and the d-block of the periodic table.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Atomic Structure
Atomic structure covers the discovery of the proton, Planck's quantum theory, hydrogen emission spectra and the evidence for quantized energy levels. You will use quantum numbers to describe orbitals, distinguish s, p, d and f orbital shapes, and write electronic configurations, including the correct order of electron filling.
Practise Atomic Structure
922 free Atomic Structure MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Atomic Structure questions
If the mass of electron is reduced to half, the Rydberg's constant:
Orbital having shape of dumbbell with a doughnut is:
If the wavelength of electromagnetic radiation is increased to thrice the digital value, then what will be the percent change in the value of frequency of the electromagnetic radiation?
Number of electrons in the outermost shell of chloride ion (Cl-) is:
In ground state, an element has 13 electrons in its M - shell. The element is:
What does negative sign in the electronic energy of hydrogen atom convey?