Which of the following sub-atomic particles has/have 1u relative mass and +1 relative charge?

• (i) Proton
• (ii) Electron
• (iii) Neutron

An atom is electrically neutral because number of protons is ___________

What is the atomic number and mass number of an element for which number of protons, neutrons and electrons is 10,12 and 10 respectively?

When alpha particles are used to bombard gold foil, most of the alpha particles pass through undeflected. This result indicates that most of the volume of a gold atom consists of:

The nucleus consists of _____________

Mass number of an atom is equal to the sum of atomic number and number of __________

If the numbers of electrons,   protons and neutrons of an atom are 8,8 and 9 respectively, What will be the mass number of that atom?

What is the charge on an oxygen atom?

The difference in the number of electrons between K and L and L and M shells is the same for an atom of element X (M shell is the valence shell) and the difference value is the number of valence electrons in the M shell of the other element Y.  Give the electronic configurations of their stable ions.

The rebounding of the alpha particles in Rutherford's experiment explains which of the following features of the atom?