Most Important Atomic Structure Quiz Test Online

1) The relative energies of 4s, 4p and 3d orbitals are in the order:

2) Which of the following ions has an electronic configuration similar to Ar?

3)

Which one of the following pairs has the same electronic configuration as neon (Ne-10)? (MDCAT 2015)

4)

Which is the correct electronic configuration of Chromium (Cr, Z=24)? (MDCAT 2018)

5) Which quantum number tells us about orientation of orbitals:

6) Number of neutrons in Zn (A=66, Z=30) is

7) In the electronic configuration of Cu and Cr, which of the following is true?

8) With increase in the value of principal quantum number 'n', the shape of the s-orbitals remain same although their sizes

9) The atomic number of an element is 26. How many electrons are present in the M shell?

10)

The number of electrons in Ga³⁺ (Gallium ion) will be (A=71, Z=31): (MDCAT 2017)

11) Maximum numbers of electron in a sub-shell is given by

12) The e/m value for the canal rays is maximum for

13) The total number of lobes in all the orbitals of a d-subshell are

14)

The maximum number of electrons in an electronic configuration can be calculated by using the formula: (MDCAT 2016)

15)

Which of the following contains the same number of electrons and protons but different neutrons? (MDCAT 2017)

16) Correct order of energy in the given sub-shell is

17) "Two electrons in the same orbital should have opposite spins" according to

18)

Which order is correct with respect to the increasing energy of orbitals? (MDCAT 2015)

19) Number of electrons in the outermost shell of chloride ion(Cl-) is

20)

According to the given number of protons, neutrons, and electrons, which option is correct? (MDCAT 2014)

1)

 Which of the following pairs has one electron in its orbital? (NMDCAT 2020)

2)

Which of the following elements in its atomic state has electrons filling first two spherically symmetrical orbitals? (SET 2019)

3)

Which of the following has the lowest charge-to-mass (e/m) ratio? (NMDCAT 2020)

4) In potassium, the order of energy levels is:

5)

The quantum number that describes the orientation of orbitals in three-dimensional space is: (ETEA 2019)

6) The electron configuration for chromium is $\left[Ar\right]4s^{1}3d^5$.
Select the best explanation for this irregular electron configuration.

7)

Which of the following is the correct electronic configuration of Chromium (Cr, Z=24)? (MDCAT 2019)

8)

The relationship between quantum numbers $n$ and l is: (NMDCAT 2020)

9) What are the values of principal quantum number and azimuthal quantum numbe for the last electron in Chlorine atom?

10)

Quantum number values for the ‘2p’ orbitals are: (NMDCAT 2020)

11)

The maximum number of electrons in a sub-shell is given by: (NUMS 2019)