The following data represents the distribution of electrons,protons,and neutrons in atoms of four elements $A, B, C, D.$
Element Protons,Neutrons,Electrons $A$ $9, 10, 9$ $B$ $16, 16, 16$ $C$ $12, 12, 12$ $D$ $17, 22, 17$
Answer the following questions:
$(a)$ Give the electronic distribution of element $B.$
$(b)$ The valency of element $A$.
$(c)$ The atomic number of element $B.$
$(d)$ The mass number of element $D$.
| Element | Protons,Neutrons,Electrons |
| $A$ | $9, 10, 9$ |
| $B$ | $16, 16, 16$ |
| $C$ | $12, 12, 12$ |
| $D$ | $17, 22, 17$ |
Answer the following questions:
$(a)$ Give the electronic distribution of element $B.$
$(b)$ The valency of element $A$.
$(c)$ The atomic number of element $B.$
$(d)$ The mass number of element $D$.
(N/A) The atomic number of element $B$ is $16$. Its electronic configuration is $2, 8, 6$.
$(b)$ The atomic number of element $A$ is $9$. Its electronic configuration is $2, 7$. To complete its octet,it gains $1$ electron. Therefore,its valency is $1$.
$(c)$ The atomic number of an element is equal to the number of protons in its nucleus. For element $B$,the number of protons is $16$,so its atomic number is $16$.
$(d)$ The mass number of an element is the sum of the number of protons and neutrons. For element $D$,mass number $= 17 + 22 = 39$.
$(b)$ The atomic number of element $A$ is $9$. Its electronic configuration is $2, 7$. To complete its octet,it gains $1$ electron. Therefore,its valency is $1$.
$(c)$ The atomic number of an element is equal to the number of protons in its nucleus. For element $B$,the number of protons is $16$,so its atomic number is $16$.
$(d)$ The mass number of an element is the sum of the number of protons and neutrons. For element $D$,mass number $= 17 + 22 = 39$.
Explore More
Similar Questions
Give one point of similarity and one point of difference between isotopes of ${ }_{6}^{14} C$ and ${ }_{6}^{12} C$.
Medium
View Solution$(a)$ Write the names of three isotopes of hydrogen.
$(b)$ State one use of an isotope of uranium.
$(c)$ Isotopes of an element have similar chemical properties. Why?
$(b)$ State one use of an isotope of uranium.
$(c)$ Isotopes of an element have similar chemical properties. Why?
Easy
View Solution$(a)$ Explain the Bohr$-$Bury rules for the distribution of electrons into different shells.
$(b)$ Draw the electronic structure of element $X$ with atomic number $17$ and element $Y$ with atomic number $16$.
$(b)$ Draw the electronic structure of element $X$ with atomic number $17$ and element $Y$ with atomic number $16$.
Medium
View SolutionRutherford's $\alpha$-particle scattering experiment showed that:
$(i)$ electrons have negative charge
$(ii)$ the mass and positive charge of the atom is concentrated in the nucleus
$(iii)$ neutron exists in the nucleus
$(iv)$ most of the space in the atom is empty
Which of the above statements are correct?
$(i)$ electrons have negative charge
$(ii)$ the mass and positive charge of the atom is concentrated in the nucleus
$(iii)$ neutron exists in the nucleus
$(iv)$ most of the space in the atom is empty
Which of the above statements are correct?
Easy
View SolutionAn atom of an element $X$ may be written as ${ }_{4}^{9} X$.
$(a)$ What does the figure $9$ indicate?
$(b)$ How many neutrons does this element $X$ contain?
$(a)$ What does the figure $9$ indicate?
$(b)$ How many neutrons does this element $X$ contain?
Medium
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo