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Each of the following properties shows a regular trend in Group 1A(1). Predict whether each increases or decreases up the group: (a) melting point;

Respuesta :

The answer is- Magnitude of melting point of group 1A metals decreases down the group.

The melting point is the temperature at which a given solid material changes from a solid state to a liquid or melt state.

On what factors, the melting point of an atom depends?

  • The melting point is governed by the attraction of the electrons of an atom towards its nucleus.
  • Thus, size of the ion plays crucial role. Smaller the size of ion, greater is the attraction and thus greater is the melting point.
  • Now, Group 1A elements are also called alkali metals and they include Lithium, Sodium, Potassium, Rubidium, Cesium, and Francium.
  • As moving down the group, the size of atom increases , thus the attraction between the electrons and nucleus decreases, and thus the melting point decreases.

To learn more about the melting point of alkali metals, visit:

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