If is the atomic number of the first alkali metal and is the atomic number of the first alkaline ear — s Block Elements Chemistry Question
Question
If $x$ is the atomic number of the first alkali metal and $y$ is the atomic number of the first alkaline earth metal, what is the value of $x+y$?
Answer: 7
💡 Solution & Explanation
The first alkali metal is Lithium ($Li$) with atomic number $x=3$. The first alkaline earth metal is Beryllium ($Be$) with atomic number $y=4$. The sum $3+4 = 7$.
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