An element is represented by ZXA, where Z is atomic number which is also equal to number of proton, A is mass number and X is symbol of the element.Mass number (A) = Number of protons (Z) + Number of neutrons.Isotopes: Atoms having same number of proton Isobar: Elements having same mass numberIsotones: Elements having same number of neutron (A-Z)An isotone of 9040Zr is _________.

An element is represented by ZXA, where Z is atomic number which is al

1.	An element is represented by ZXA, where Z is atomic number which is also equal to number of proton, A is mass number and X is symbol of the element.Mass number (A) = Number of protons (Z) + Number of neutrons.Isotopes: Atoms having same number of proton Isobar: Elements having same mass numberIsotones: Elements having same number of neutron (A-Z)An isotone of 9040Zr is _________.
Answer» An element is represented by $_{Z} X^{A}$ , where Z is atomic number which is also equal to number of proton, A is mass number and X is symbol of the element. Mass number (A) = Number of protons (Z) + Number of neutrons. Isotopes: Atoms having same number of proton Isobar: Elements having same mass number Isotones: Elements having same number of neutron (A-Z) An isotone of $_{40}^{90} Z r$ is _________.