Question

periodic table of elements
in the compound ( xy_2 ), the element represented by x can be classified as which of the following?
select two correct answers.
group 2 element
group 1 element
metal
noble gas
nonmetal

Explanation:

Step1: Determine the charge of X

In the compound \(XY_2\), let the charge of \(X\) be \(+n\) and the charge of \(Y\) be \(-m\). Using the rule of charge balance in a compound (\(n\times1 + m\times2=0\)). If we assume \(Y\) is a non - metal that gains one electron (like halogens with a charge of \(- 1\)), then from \(X + 2Y=0\), we have \(X=+2\).

Step2: Classify the element based on charge

Elements with a \(+2\) charge in ionic compounds are typically group 2 elements. Group 2 elements are metals.

Answer:

group 2 element, metal