The nucleus has ______ and _________.

Division of nucleus is called___________.

Sun : Nucleus, Planets : ________.

An atom of an element has 13 electrons and mass number 27. the nucleus of this atom contains ________ neutrons.

Atomic nucleus was discovered by ______________.

Consider the following very rough model of a beryllium atom. The nucleus has four protons and four neutrons confined to a small volume of radius 10^(-15)m . The two 1s electrons make a spherical charge cloud at an average distance of 1.3 xx 10^(-11) m from the nucleus, whereas the two 2s electrons make another spherical cloud at an average distance of 5.2 xx 10^(-11) m from the nucleus. Find the electric field at (a) a point just inside the 1 s cloud and (b) a point just inside the 2s cloud.

The nucleus of some elements is __________.

The nucleus of an atom contains :

Nucleus is stained using

The nucleus which has radius one-third of the radius of Os^(189) is

Fusion product of protoplast without nucleus ________.