1 skeleton equation
Na +O2 =>Na2O
Balanced equation
4Na + O2 =>2 Na2O
2.word equation
Zinc +magnesium phosphide=magnesium + zinc phosphide
Balanced equation
3Zn +Mg3P2 =3Mg+ Zn3p2
3skeleton equation
Al +Br2 =>AlBr3
Balanced equation
2Al +3Br2 => 2AlBr3
4 word equation
Lithium + sulphur =>lithium sulphide
2Li + S => Li2S
Potassium Sulfate = K₂SO4
SO4 = negative 2, so you need 2 K+ ions to counteract it, hence K₂
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.
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