Molecular formula of the chloride of an element X is XCl. this compound is a solid having a high melting point. which of the following elements is present in the same group (in the modern periodic table) as X.
a) Na
b) Mg
c) Al
d) Si
Answers
Answer : The correct option is a) Na
Explanation :
The given formula is XCl. Here we can see that there is 1 X atom for 1 Cl atom.
When an ionic compound is formed, electrons are transferred from a metal atom to a non metal atom.
This results in the formation of a cation and anion. In the formula, the charges on cation and anion balance each other.
The formula given to us is XCl. that means the charge on X and Cl should balance each other.
The charge on Cl is known, therefore we can find out the charge on metal ion X that would balance the charge on Cl.
The charge on Cl ion is -1 . In order to have a neutral compound, the charge on metal ion should be +1.
Out of the given options , the only option that has a metal atom with +1 charge is option a ) Na.
Charge on Na is +1 and therefore it combines with Cl⁻ to form NaCl.
The element that is present in the same group as X is Na.
The molecular formula of the sodium is represented as the Na .
And it is one of the well know and huge used chemical so that the table salt .
The chemical formula for the sodium chloride is NaCl and its molar massive is 58 . 44 gm mol.
It is ionic compound consisting of sodium cation.( Na+)