The element X that has 11 protons is Sodium (Na) with a valency of 1.
The combining power of an element, as measured by the number of hydrogen atoms it can displace or combine with, is known as valency.
Sodium has 11 protons with an electronic configuration of (2,8,1). To attain a noble gas configuration, it loses 1 electron and hence its valency is 1.
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The element X that has 11 protons is Sodium (Na) with a valency of 1.
The combining power of an element, as measured by the number of hydrogen atoms it can displace or combine with, is known as valency.
Sodium has 11 protons with an electronic configuration of (2,8,1). To attain a noble gas configuration, it loses 1 electron and hence its valency is 1.