Structure of Atom: It Consist of Three Basic Particles i.e, Protons, Electrons, and Neutrons

In this quiz, you will find questions related to atoms, their structure, postulates, and different proposed models of an atom.

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Elements do emit radiation on their own and this property is known as _____

Radioactivity Refraction Absorption Adsorption

Which of the following statements you think is wrong regarding α particle scattering effect?

α particles mostly move through the gold foil having zero deflection A small fraction are deflected One in Twenty Thousand turns 180° The thickness of the gold foil is about 100μm

If the number of protons and neutrons of an element is 13 and 14 respectively, then what’s the atomic number(Z) and mass number(A)?

13, 13 13, 27 14, 13 27, 14

How many orbitals can have the following set of quantum numbers, n = 3, l = 1, m1 = 0 ?

3 1 4 2

Electronic configuration of the outer shell of the element Gd with atomic number 64 is

4f4 5d5 6s1 4f3 5d5 6s2 4f5 5d4 6s1 4f7 5d1 6s2

Maximum number of electrons in a subshell can be

4l + 2 4l – 2 2n2 2l + 1

Number of unpaired electrons in N2+

3 1 2 0

The ionization enthalpy of hydrogen atom is 1.312 × 106 J mol-1. The energy required to excite the electron in the atom from n = 1 to n = 2 is

8.51 × 105 J mol-1 6.56 × 105 J mol-1 7.56 × 105 J mol-1 9.84 × 105 J mol-1

A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at:

518 nm 1035 nm 325 nm 743 nm

Which of the following statements in relation to the hydrogen atom is correct?

3s orbital is lower in energy than 3p orbital 3p orbital is lower in energy than 3d orbital 3s and 3p orbitals are of lower energy than 3d orbital 3s, 3p and 3d orbitals all have the same energy

The magnetic quantum number specifies

Size of orbitals Shape of orbitals Orientation of orbitals Nuclear Stability

The electronic configuration of silver atom in ground state is

[Kr]3d104s1 [Xe]4f145d106s1 [Kr]4d105s1 [Kr]4d95s2

What is the absolute charge of a proton?

+1.602176×10^-27

–1.602176×10^-19

+1.602176×10^-19

–1.602176×10^-27

Which of the following models are not the same as Thomson Model of Atom?

Plum pudding model

Watermelon model

Raisin pudding model

Nuclear model

The orientation of atomic orbitals depends on their

Spin quantum number

Magnetic quantum number

Azimuthal quantum number

Principal quantum number

Which of the following is never true for cathode rays ?

They are electromagnetic waves. They produce heat. They produce mechanical pressure They possess kinetic energy.

Which of the following statement is not correct about the characteristics of cathode rays?

Characteristics of cathode rays depend upon the nature of gas present in the cathode ray tube Characteristics of cathode rays do not depend upon the material of electrodes in cathode ray tube They travel in straight line in the absence of an external electrical or magnetic field. They start from the cathode and move towards the anode.

Which of the following statements about the electron is incorrect?

The mass of electron is equal to the mass of neutron It is a basic constituent of all atoms. It is a constituent of cathode rays. It is negatively charged particle

While performing cathode ray experiments, it was observed that there was no passage of electric current under normal conditions. Which of the following can account for this observation ?

Air is a poor conductor of electricity under normal conditions Carbon dioxide is present in air Dust particles are present in air None of the above

Cathode rays are deflected by

By both

An electric field only

Magnetic field only

By none

Quiz/Test Summary

Title: Structure of Atom: It Consist of Three Basic Particles i.e, Protons, Electrons, and Neutrons

Questions: 20

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