Which family in the periodic table has metals that are usually harder than other metals?
Alkali metals
Alkaline earth metals
Lanthanide series
Transition metals
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Ответ:
Transition metals
Explanation:
The transition metals are usually harder than other metals such as the alkali metal, lanthanide series metals and the alkaline earthmetals.
The reason for this is because they have a stronger metallic bonding between their atom.
Hardness is a physical property which is attributed to intermolecular forces and the atomic arrangement
The transition metals are found in the d - block on the periodic table.
They have a d-orbirtal which confers extra electrons and higher degree of stability to the atom. The d-orbirtal provides more delocalized electrons for the metallic bonds formed.
Ответ:
increased demand for services, higher costs for medicare, more need for long-term care
Explanation: these are the answers