Atomic Structures

The electron present in a particular orbit _ energy.

Na may be denoted by _ electron configuration notation.

With increase in number of unpaired electrons, paramagnetism:

The elements of lllA to VlllA subgroups except He are known as _ block elements.

In Modern Periodic Table, the elements in Group II-B are:

Splitting of spectral lines in closely spaced lines in presence of magnetic field is called:

The extent of bonding of a light ray after passing through prism depends upon:

In atomic particles:

During isotopic analysis, the pressure of the vapours of the ions maintained in the ionization chamber of mass spectrometer Is:

Which quantum number helps to study the orientation of an orbital in space?

The ionization energy of hydrogen atom is :

The charge of one gram of electron is:

The relative abundance of the isotopes of the elements can be determined by:

Paramagnetic behavior of an atom, ion or molecule is due to presence

Energy required to remove an electron from the outermost shell of its isolated gaseous atom in the ground state is:

The nature of cathode rays in discharge tube:

The elements for which the value of ionisation energy is low, can:

In mass spectrometer, detector or collector measures the:

Which one remains the same throughout a period?

With the increase in the value of Principal Quantum Number ‘n’, the shape of the s-orbitals remains the same although their sizes :

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

What is the trend of melting and boiling point of the elements of short periods as we move from left to right in a periodic table?

A sample of Neon is found to exist as 20Ne, 21Ne, 22Ne. Mass spectrum of ‘Ne’ is as follows: What is the relative atomic mass (Ar value) of Neon?

Arrange the following elements according to the trend of ionization energies. (C, N, Ne, B)

If the e/m value of electron is 1.7588 x 10¹¹ C/kg, then what would be the mass of electron in grams (charge on electron is 1.6022 x 10^-19 coulombs)?

According to the number of protons, neutrons and electrons given in the table, which one of the following options is correct?

The weight of an electron is:

Which one of the following will have the smallest radius?

There are four orbitals s, p, d and f. Which order is correct with respect to the increasing energy of the orbitals?

Which one of the following pairs has the same electronic configuration as possessed by Neon ?

With the help of spectral data given, calculate the mass of Neon and encircle the best option. (Percentage of , and are 90.92%, 0.26% and 8.82% respectively).

The maximum number of electrons in an electronic configuration can be calculated by using formula:

Number of neutrons in is:

The substance for the separation of isotopes is first converted into the:

The charge on one gram of electrons is:

In the modern periodic table, the elements in Group II-B are:

Isotonic symbol of the ion of Sulphur-33 is shown below. How many protons and neutrons are present if the number of electrons are 18?

What is the number of electrons in the following ion?

Ga³⁺

Among the following, which contains the same no. of electrons & protons but different no. of neutrons:

The shape of s-orbital is _ and the shape of p-orbital is _.

The following sketch shows the variation in a physical property of third period elements against their atomic numbers: What physical property is plotted in this sketch?

Nitrogen has an atomic number of 7.Which of the following electronic configurations is of a nitrogen atom in the ground state?

Ionization energy decreases down the group, from top to bottom, due to:

Which two elements are isotopes?

The average atomic mass of Boron is 10.8. It has two isotopes of masses 10 and 11 respectively. What is the percentage of isotope with the average mass of 10?

Which element has the ground state electronic configuration of 1s², 2s², 2p⁶, 3s² ,3p⁶?

Which gas in the discharge tube produces lightest canal ray particles?

According to which scientist, the probability of finding an electron at a certain position is possible?

One a. m .u stands for

The average weight of atoms of an element compared to the weight of one atom of _ is called atomic weight.

Which element is used as standard to determine atomic mass of an element?

Which element has the ground state electronic configuration of 1s², 2s², 2p⁶, 3s², 3p⁶?

When 6d orbital is filled, the entering electron goes into?

The p orbital has:

No individual atom in the sample of 1 mole of Neon has a mass of 20.18 a.m.u. Because it is:

The type and relative amount of each isotope in an element can be found by:

The atomic masses of elements depend upon:

Which of the following electronic configurations is correct for carbon?

The element with smallest value of Ionization energy is:

Number of unpaired electrons in Boron in ground state is/are:

The value of Planck's constant is:

Shape of orbital is determined by quantum number:

Which set of quantum numbers is not allowed for an electron:

The element having electronic configuration of noble gas notation (Kr)5s²,4d⁶ is:

Electronic configuration of is:

Which of the following element will show electronic configuration of outermost shell like ns²,np⁵?

Which of the following is not true about canal rays?

The correct sequence of electronic configuration is:

The maximum e/m ratio for positive rays is obtained when the discharge tube contains:

Proton number of is:

What is the electronic configuration of C?

Which element has the ground state electronic configuration of ?

Which gas in the discharge tube produces lightest canal rays particles?

Isotopic symbol of ion of Sulphur-33 is ^-2.How many numbers of protons and neutrons are present if number of electrons are 18?

Number of electrons in ⁺³ will be:

The maximum number of electrons in electronic configuration can be calculated by using formula:

Number of neutrons in will be:

Which one of following pairs has the same electronic configuration as possessed by neon ?

According to the number of protons,neutrons and electrons given in the table,which one of following options is correct?

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

A specie Z has following electronic configuration:

What could Z be?

Which one of following electronic configuration represents an element that will form a simple ion with -3charge?

Which one of the following represents most stable configuration of three electrons for ground state of an element in group VA?

Which of the following violates Hund's rule?

Which one of following ions has similar electronic configuration like Ar?

The correct electronic configuration of 29Cu is:

The electronic configuration of an element is 1s²,2s²,2p¹_x,2p¹_y,2p¹_z.This represents a/an:

---------is/are iso-electronic with K⁺.

The d-orbital which is bi-lobed with collar is represented as:

Plank's equation is:

Positive rays give flash on:

The mass of proton is:

Number of lobes in 2d^z:

The ratio of energy and the frequency of photon is equals to:

Which Of the following has the lowest e/m value?