The symbol of "Beryllium" is
Radioisotopes can also be traced
If we add an electron to the outermost shell of an atom, the charge turns
The symbol of "sodium" is
The number of important particles in an atom is
The valency of inert of rare gases is
If we remove electron from the outer shell, the atom turns
Every element has its own
Water contains
The 'isotope' carbon-12 makes up about
One molecule of carbon dioxide consists of
Atoms of different elements differ from each other because of
When salt is formed, sodium
In an atom of carbon, electronic configuration is
When the transfer of electrons takes place, the sodium and chlorine atoms turn into
The activity of organs in a human body can be studied by
The valency of aluminum is
In element Uranium-235, the combined number of neutrons and protons is
'Chlorine' becomes an anion because
A material which is made up of one type of atom is known as
Third shell with third energy level is known as
Nuclear energy is released all at once in
The third shell can hold up to
Name of the important particles in an atom are
If atom would have been enlarged to a football ground size, the nucleus would be the size of
Scientists name isotopes by putting
'Nucleus' is surrounded by
The smallest atom in 'periodic table' yet found is
The number of neutrons in carbon-13 is
The orbits on which electrons revolve around the nucleus are called
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