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

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

An ion with mass number 37 possesses one unit of negative charge. If the ion contains '11.1 %' more neutrons than the electrons, find the symbol of the ion.

The mass number of an atom is 31 . The M shell. of this atom contains 5 electron. A)What is the atomic number of this atom?.B)How many neutrons does this atom have?.C)Write the electronic configuration.

The mass number of an atom is 31. The M shell of this atom contains 5 electrons. What is the atomic number of this atom?

An atom of an element contains 29 electrons and 35 neutrons. Deduce (i) the number of protons and (ii) the electronic configuration of the element.

True or false? . a) All particles in the atom have charge. b) Electron and proton haveopposite charges. So atom has no charge. c) Mass number is the total number of electron, proton and neutron. d) The number of neutrons are obtained on substracting atomic number from mass number.

There are 11 electrons and 12 neutrons In an atom. Find out the atomic number and mass number.

Statement 1: 'Atomic mass is the fundamental property of an element.' Statement 2: 'Atomic number is a more fundamental property of an element than its atomic mass.' a) Which statement is correct? Justify your answer. b) Name the scientist who proposed this statement? What observation led him to this conclusion?

Write the atomic number of an atom is 18 and mass number is 40 Find the number of protons, electrons, and neutrons in the atom.