A metal will tend to lose electrons and hence the atomic radius is higher than the ionic radius.
As a metal it is atomic.
Sodium has a larger atomic radius and is more metallic.
The alkali earth metal with the smallest atomic radius would be beryllium(Be), number four
Platinum is a metal element. Atomic mass of it is 195.08.
Ions of opposite charge, cations and anions. Often these involve a metal cation and a non-metal anion but this is not always the case for example ammonium sulfate contains a poly atomic cation and a poly atomic anion and all of the elements present are non-metals.
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As a metal it is atomic.
Samarium has a calculated atomic radius of 238 pm.
Sodium has a larger atomic radius and is more metallic.
The alkali earth metal with the smallest atomic radius would be beryllium(Be), number four
Atoms increase in size as you go down a column and are larger going from right to left across a row.because while going from left to right in a period electrons enter in the same orbit and hence the attraction between the nucleus increasees
this is because the effect of the increased nucleus i roughly balanced by the greater screening effect produced by adding to the penultimate shell
Because the metal loses an electron (making it smaller) and the non metal gains that electron, making it larger.
Polonium (Po) has an atomic radius of 168 picometers.
Gallium is a non metal element. Atomic mass of it is 70.
Radium (Ra) Z = 88.
Platinum is a metal element. Atomic mass of it is 195.08.