Question

An element ‘X’ has atomic number 13:; (a) Write its electron configuration.; (b) state the group to which ‘X ‘belongs?; (c) Is ‘X’ a metal or a non- metal?; (d) Write the formula of its bromide.(Delhi - 2012)

Answer 1

Hope this helps you!!!

Answer 2

From the given conditions, the element 'X' is identified as Aluminium.

Given:

• Atomic number of element 'X' = 13

(a) Electronic configuration:

• To write the electronic configuration of the element, its atomic number is required.
• From the atomic number, the element 'X' is identified as Aluminium.
• Its electronic configuration is $1s^22s^22p^63s^23p^1$.

(b) Group

• Element 'X' which is identified as aluminium belongs to group 13 of the periodic table.

(c) Metallic character

• Element 'X' is metal.

(d) Bromide of aluminium

• When aluminium reacts with bromine it leads to the formation of a compound called aluminium bromide and its chemical formula is $AlBr_3$.
• The chemical equation involved in the reaction is as follows:

$2Al+3Br_2\rightarrow2AlBr_3$

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