A metal M forms an oxide having the formula M 2 O 3 . It belongs to third period. Write the atomic number and valency of the metal.

Chemistry

A metal M forms an oxide having the formula M₂O₃. It belongs to third period. Write the atomic number and valency of the metal.

Periodic Table

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Answer

The metal is Aluminium. Its
Atomic Number = 13,
Valency = 3.

Valency of O is 2 so valency of M is 3. Therefore, M belongs to 13^th group. It is given that M belongs to 3^rd period, hence, it has atomic number 13.

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Elements	A	B	C
m.p.	63.0	180.0	97.0

Chemistry

A metal M forms an oxide having the formula M₂O₃. It belongs to third period. Write the atomic number and valency of the metal.

Periodic Table

Answer

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Chemistry

A metal M forms an oxide having the formula M2O3. It belongs to third period. Write the atomic number and valency of the metal.

Periodic Table

Answer

Related Questions

Arrange :(i) Be, Li, C, B, N, O, F (in increasing metallic character).(ii) Si, Na, Al, Mg, Cl, P, S (in decreasing non-metallic character).

State the trend in chemical reactivity :(i) Across the third period from left to right,(ii) Down the group.(a) in group IA (1) (b) in group VIIA (17)

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A metal M forms an oxide having the formula M₂O₃. It belongs to third period. Write the atomic number and valency of the metal.

Arrange :
(i) Be, Li, C, B, N, O, F (in increasing metallic character).
(ii) Si, Na, Al, Mg, Cl, P, S (in decreasing non-metallic character).

State the trend in chemical reactivity :
(i) Across the third period from left to right,
(ii) Down the group.
(a) in group IA (1) (b) in group VIIA (17)

The given table shows elements with same number of electrons in its valence shell.
Elements A B C
m.p. 63.0 180.0 97.0
State :
(i) Whether these elements belong to same group or period.
(ii) Arrange them in order of increasing metallic character.