Fill in the following blanks in respect of an atom of an element :

No. of protons No. of neutron Mass number Atomic number No. of electrons Symbol

11 12 ................ ................ ................ ................

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Solution

NO. OF PROTONS NO. OF NEUTRONS MASS NO. ATOMIC NO. NO. OF ELECTRONS SYMBOL

11 12 23 11 11 Na

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Fill in the following blanks in respect of an atom of an element :

Number of protons	Number of neutrons	Mass number	Atomic number	Number of electron	Valency
11	12	.............	.............	.............	.............

Complete the following table relating to the atomic structure of some elements.

$\begin{matrix} Element & Atomic & Mass & Number of & Number of & Number of Symbol & Number & Number & Neutrons & Electrons & Protons L i & 3 & 6 C l & 17 & 20 N a & 12 & 11 A l & 27 & 13 S & 32 & 16 \end{matrix}$

Fill in the following blanks :

Atomic Number	Mass Number	Protons	Neutrons	Electrons	Symbol
10	22	................	................	................	................

Complete the following table.

Atomic number	Mass number	Number of Neutrons	Number of protons	Number of electrons	Name of the Atomic species
9	−	10	−	−	−
16	32	−	−	−	Sulphur
−	24	−	12	−	−
−	2	−	1	−	−
−	1	0	1	0	−

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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No. of protons	No. of neutron	Mass number	Atomic number	No. of electrons	Symbol
11	12	................	................	................	................

NO. OF PROTONS	NO. OF NEUTRONS	MASS NO.	ATOMIC NO.	NO. OF ELECTRONS	SYMBOL
11	12	23	11	11	Na

Fill in the following blanks in respect of an atom of an element : No. of protons No. of neutron Mass number Atomic number No. of electrons Symbol 11 12 ................ ................ ................ ................

NO. OF PROTONS NO. OF NEUTRONS MASS NO. ATOMIC NO. NO. OF ELECTRONS SYMBOL 11 12 23 11 11 Na

Fill in the following blanks in respect of an atom of an element :

No. of protons No. of neutron Mass number Atomic number No. of electrons Symbol

11 12 ................ ................ ................ ................

NO. OF PROTONS NO. OF NEUTRONS MASS NO. ATOMIC NO. NO. OF ELECTRONS SYMBOL

11 12 23 11 11 Na