(A) For the atom $_{13}Al^{27}$:$1$. The atomic number $(Z)$ is $13$,which represents the number of protons $(a = 13)$.$2$. In a neutral atom,the numb

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(A) For the atom $_{13}Al^{27}$:$1$. The atomic number $(Z)$ is $13$,which represents the number of protons $(a = 13)$.$2$. In a neutral atom,the number of electrons $(b)$ is equal to the number of protons,so $b = 13$.$3$. The mass number $(A)$ is $27$. The number of neutrons $(c)$ is calculated as $A - Z = 27 - 13 = 14$.$4$. The required ratio $(c : b : a)$ is $14 : 13 : 13$.

Class 11 Chemistry Structure of Atom Atomic number, Mass number, Atomic species

Easy

In the atom $_{13}Al^{27}$,the number of protons $(a)$,electrons $(b)$,and neutrons $(c)$ are present. Determine the ratio in the order $(c : b : a)$.

A
$14 : 13 : 13$
B
$13 : 13 : 14$
C
$13 : 14 : 13$
D
$14 : 13 : 14$

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Structure of Atom

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Atomic number, Mass number, Atomic species

The ratio between the number of neutrons in $C$ (atomic mass $12$) and $Si$ (atomic mass $28$) is

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Which of the following statements is false?

Medium

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Match the isotopes in List $I$ with the number of neutrons in List $II$.
$(A)$. $^{24}_{12}Mg$ $(I)$. $5$
$(B)$. $^{27}_{13}Al$ $(II)$. $12$
$(C)$. $^{9}_{4}Be$ $(III)$. $6$
$(D)$. $^{12}_{6}C$ $(IV)$. $14$

MediumMHT CET 2026

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Match the following atomic species with their correct classification:

$(i) \ { }_{26} Fe ^{54}, { }_{26} Fe ^{56}, { }_{26} Fe ^{57}, { }_{26} Fe ^{58}$ $(a)$ Isotopes

$(ii) \ { }_1 H ^3, { }_2 He ^3$ $(b)$ Isotones

$(iii) \ { }_{32} Ge ^{76}, { }_{33} As ^{77}$ $(c)$ Isodiaphers

$(iv) \ { }_{92} U ^{235}, { }_{90} Th ^{231}$ $(d)$ Isobars

$(v) \ { }_1 H ^1, { }_1 D ^2, { }_1 T^3$

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An element with mass number $181$ contains $32 \%$ more neutrons as compared to protons. What is the symbol of that element?

EasyAP EAMCET 2019

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$(A)$. $^{24}_{12}Mg$	$(I)$. $5$
$(B)$. $^{27}_{13}Al$	$(II)$. $12$
$(C)$. $^{9}_{4}Be$	$(III)$. $6$
$(D)$. $^{12}_{6}C$	$(IV)$. $14$

$(i) \ { }_{26} Fe ^{54}, { }_{26} Fe ^{56}, { }_{26} Fe ^{57}, { }_{26} Fe ^{58}$	$(a)$ Isotopes
$(ii) \ { }_1 H ^3, { }_2 He ^3$	$(b)$ Isotones
$(iii) \ { }_{32} Ge ^{76}, { }_{33} As ^{77}$	$(c)$ Isodiaphers
$(iv) \ { }_{92} U ^{235}, { }_{90} Th ^{231}$	$(d)$ Isobars
$(v) \ { }_1 H ^1, { }_1 D ^2, { }_1 T^3$

In the atom $_{13}Al^{27}$,the number of protons $(a)$,electrons $(b)$,and neutrons $(c)$ are present. Determine the ratio in the order $(c : b : a)$.

Similar Questions

The ratio between the number of neutrons in $C$ (atomic mass $12$) and $Si$ (atomic mass $28$) is

Which of the following statements is false?

Match the isotopes in List $I$ with the number of neutrons in List $II$.$(A)$. $^{24}_{12}Mg$$(I)$. $5$$(B)$. $^{27}_{13}Al$$(II)$. $12$$(C)$. $^{9}_{4}Be$$(III)$. $6$$(D)$. $^{12}_{6}C$$(IV)$. $14$

An element with mass number $181$ contains $32 \%$ more neutrons as compared to protons. What is the symbol of that element?

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Match the isotopes in List $I$ with the number of neutrons in List $II$.
$(A)$. $^{24}_{12}Mg$ $(I)$. $5$
$(B)$. $^{27}_{13}Al$ $(II)$. $12$
$(C)$. $^{9}_{4}Be$ $(III)$. $6$
$(D)$. $^{12}_{6}C$ $(IV)$. $14$