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Answer is: <span>all of them are hard and dense metals.
Beryllium, magnesium,calcium and strontium are a</span>lkaline earth metals. The elements have very similar properties. Alkaline earth metals<span> have in common an outer s- </span>electron shell (two electrons). Strontium has greatest density of this four elements.
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Hope answer is right, d=136
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To express y in terms of x is to find an expression that relates the value of x with y. This is to write a model, function, expression or formula that permits to input a value for x and the outcome will be the value of y. .For example if you have y = 2x, y is in terms of x and you can input different values of x to obtain corresponding values (outputs) of y.
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The study of the mass relationships of element compounds is known as composition stoichiometry
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