You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard IX

Chemistry

Bohr's Model of an Atom

It has been f...

Question

It has been found that nuclides with 2, 8, 20, 50, 82, and 126 protons or neutrons are exceptionally stable. These numbers are referred to as the magic numbers and their existence has led us to:

the idea of periodicity in nuclear properties similar to the periodicity of chemical elements in periodic table

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

the so-called "liquid drop model of the nucleus"

No worries! We‘ve got your back. Try BYJU‘S free classes today!

the so-called "shell model of the nucleus"

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

have a convenient explanation of "nuclear fission"

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct options are
A the idea of periodicity in nuclear properties similar to the periodicity of chemical elements in periodic table
C the so-called "shell model of the nucleus"
The idea of periodicity in nuclear properties similar to the periodicity of chemical elements in periodic table the so-called "shell model of the nucleus".

Suggest Corrections

Similar questions

Q. The numbers

2, 8, 20, 28, 50, 82

and

126

representing the number of protons in a nucleus are called.

Q. Assertion :An elements nuclear charge is equal to the number of protons in the nucleus Reason: The only charged particles in the nucleus are neutrons

Fill in the blanks in the following statements :

(a) The number of protons in the nucleus of an atom is called its ....................

(b) The total number of protons and neutrons in the nucleus of an atom is called its ....................

(d) An atom of an element has 11 protons, 11 electrons and 12 neutrons. The atomic mass of the atom is ....................

(e) If the nucleus of an atom has atomic number 17, mass number 37 and there are 17 electrons outside the nucleus, the number of neutrons in it is ....................

(f) Almost all the mass of an atom is concentrated in a small region of space called the ....................

(g) Cathode rays are a beam of fast moving ....................

(h) The anode rays obtained from hydrogen gas consist of particles called ....................

(i) The maximum number of electrons that can be accommodated in L shell are ....................

(j) The maximum number of electrons that can go into the M shell is ....................

(k) The subatomic particle not present in a hydrogen atom is ....................

(l) The electron has .................... charge, the proton has .................... charge, and the neutron has .................... charge.

Q. Assertion :Light nuclei are most stable if

N = Z

, while heavy nuclei are more stable if

N > Z

. (

N \to

number of neutrons,

Z \to

number of protons). Reason: As the number of protons increases in a nucleus, the Coulomb's repulsive force increases, which tends to break the nucleus apart. So, to keep the nucleus stable, more number of neutrons are needed which are neutral in nature.

Q. A neutral atom of an element has a nucleus with a nuclear charge

13

times and mass

27

times as that of hydrogen nucleus. What is the ratio of electrons to protons in its stable positively charged ion?

Join BYJU'S Learning Program