An element with mass number `81` contains `31.7%` more neutrons as compared to protons. Assign the atomic symbol.

An element with mass number 81 contains 31.7% more neutrons as compared to protons. Find the symbol of the element.

An element with mass number 81 contains 31.7% more neutrons as compared to protons. Write the symbol for the isotope in the standard fromat. Strategy: Let us assume that the number of protons =p . Then, Number of neutrons (n) = p +31.7% of p

Species X with mass number 37 contains 11.1 % more neutrons as compared to electrons , then what is the incorrect repesentation of element x?

An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons then electrons. Assign the symbol to this ion.

The mass number of two elements X and Z are 52 and 75 respectively. X contains 16.6% more neutrons compared to protons. Z contains 27.3% more neutrons compared to protons. X and Z are respectively:

A hypothetical ion of element X with mass number 40 , posses 2 units of positive charge and 23% more neutrons than electrons. Symbol of the ion is :

A hypothetical of element X with mass number 40, posses 2 units of positive charge and 23% more neutrons than electrons. Symbol of the ion is :

(a) Describe Thomson's model of the atom. Which subatomic particle was not present in Thomson's model of the atom? (b) The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?

The atomic number of an element is 5 and mass number is 11. Find the number of electrons, protons and neutrons present in an atom of it. How can this element be represented ?