The table given below shows the number of protons and number of neutrons present in the nuclei of elements P and Q - array - c - c - -hline Nuclei - Number - of - protons - Number of - neutrons lllhline P - 1 - 1 WhlineQ - 1 - 2 1 hline lendarray Calculate the mass number of P and Q - What is the relation between P and Q- Which element do they represent-

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Standard X

Physics

Nucleus: Common Terms

The table giv...

Question

The table given below shows the number of protons and number of neutrons present in the nuclei of elements P and Q:

$\begin{matrix} N u c l e i & N u m b e r o f p r o t o n s & N u m b e r o f n e u t r o n s P & 1 & 1 Q & 1 & 2 \end{matrix}$

Calculate the mass number of P and Q. What is the relation between P and Q? Which element do they represent?

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Solution

Mass number of P = Number of protons + Number of neutrons = 1+1=2

Mass number of Q = 1+2 = 3

P and Q are isotopes. It is because they have same atomic number 1, but different atomic masses 2 and 3 respectively. P and Q represent isotopes of hydrogen.

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Composition of the nuclei of two atomic species A and B is given as under :

	A	B
Protons :	18	20
Neutrons :	22	20

Give the mass numbers of A and B. What is the relation between the two species and which element or elements they represent ?

Q. Composition of the nuclei of two atomic species A and B is given as under:

	A	B
Protons:	18	20
Neutrons:	22	20

Give the mass numbers of A and B. What is the relation between the two species and which element or elements they represent?

Q. Match the properties of the species in Column I with the calculated number in Column II.

\begin{matrix} Column I & Column II i . & Number of protons in the element with mass number 81 & p . & 50 and having 31.7 % more neutrons than protons i i . & Ionic mass of M^{2 +} which is isoelectronic of C O_{2} and has & q . & 26 (Z+2) neutrons . i i i . & Ionic mass of X^{-} with 17 protons and having 11.1 % & r . & 35 more neutrons than electrons i v . & Atomic number of M^{3 +} with mass number 56 and having & s . & 37 30.4 % more neutrons than electrons \end{matrix}

Q. Match the properties of the species in Column I with the calculated number in Column II.

\begin{matrix} Column I & Column II i . & Number of protons in the element with mass number 81 & p . & 50 and having 31.7 % more neutrons than protons i i . & Ionic mass of M^{2 +} which is isoelectronic of C O_{2} and has & q . & 26 (Z+2) neutrons . i i i . & Ionic mass of X^{-} with 17 protons and having 11.1 % & r . & 35 more neutrons than electrons i v . & Atomic number of M^{3 +} with mass number 56 and having & s . & 37 30.4 % more neutrons than electrons \end{matrix}

Complete the table given below by identifying P, Q, R and S.

$\begin{matrix} E l e m e n t & S y m b o l & N o . o f & N o . o f & N o . o f P r o t o n s & N e u t r o n s & E l e c t r o n s S o d u m & _{11}^{23} N a & 11 & P & 11 C h l o r i n e & _{17}^{35} C l & Q & 18 & 17 U r a n i u m & R & 92 & 146 & 92 S & _{9}^{19} F & 9 & 10 & 9 \end{matrix}$

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The table given below shows the number of protons and number of neutrons present in the nuclei of elements P and Q: NucleiNumber of protonsNumber of neutronsP11Q12 Calculate the mass number of P and Q. What is the relation between P and Q? Which element do they represent?

Mass number of P = Number of protons + Number of neutrons = 1+1=2 Mass number of Q = 1+2 = 3 P and Q are isotopes. It is because they have same atomic number 1, but different atomic masses 2 and 3 respectively. P and Q represent isotopes of hydrogen.

Mass number of P = Number of protons + Number of neutrons = 1+1=2

Mass number of Q = 1+2 = 3

P and Q are isotopes. It is because they have same atomic number 1, but different atomic masses 2 and 3 respectively. P and Q represent isotopes of hydrogen.