Properties that are shared
yes
Four physical properties shared by the metallic elements are that they are ductile, malleable, have good thermal conductivity, and have a metallic luster. They are also good conductors of electricity.
For example the density, refractive index, state of matter, spectral properties etc.
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They have high ionization energy and high electronegativity.
Any one property can be shared by several minerals.
Conductivity (of both heat and electricity) and malleability.
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In a covalent bond the electrons are shared between atoms.
they have the same number of valence electrons they have similar chemical properties
They are all solids. They have properties of metals and non metals.
Color and streak would be the least useful, because they may be shared by a multitude of other minerals.