Physical Property of Metal - Physical State
Physical Property of Metal - Physical State
Physical properties of metals :
Physical properties include physical state, luster, colour, hardness, malleability, ductility, thermal conductivity, electrical conductivity, and sonority.
Physical state:
Metals: almost all metals are solids at room temperature. Mercury, Gallium, Francium, Cesium, and Rubidium are the only metals known to occur in a liquid state at or near room temperature.
Electronic configuration of metals: Metal atoms generally possess 1, 2 or 3 electrons in their outermost shells or valence shells. For example, the electronic configurations of sodium, magnesium and aluminum are given below. Thus, sodium, magnesium and aluminum are metals as they have 1, 2 and 3 electrons respectively in their outermost shells.
Exceptions: Hydrogen and helium have in their outermost shells 1 and 2 electrons respectively, but they are not metals. In these cases, the outermost shell is the first and only shell (K shell).
Electropositive character: Metals have high electro positivity, that is the metal atoms have a high tendency to lose their valence electrons and become positive ions (cations). By losing electron (s), a metal atom tends to acquire the stable configuration of the nearest noble gas.
Which metal is found in liquid state at room temperature ? | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following non-metals exists as solid? | |||
| Right Option : D | |||
| View Explanation | |||
Metal atoms have a high tendency to __________________ their valence electrons and become positive ions (cations). | |||
| Right Option : A | |||
| View Explanation | |||
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