Most Important Atomic Structure Quiz Test Online

1)

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

2)

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

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

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

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

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

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

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

9)

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

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

11)

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

12)

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

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

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

15)

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

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

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

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

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

20)

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

1)

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

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

3)

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

4)

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

5)

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

6)

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

7)

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

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

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

10)

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

11)

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