Question

An element X is in group 2 of the periodic table.
(a) What will be the formula of its chloride?
(b) What will be the formula of its oxide?

Answer 1

In order to answer this question, to know the formula of chloride and oxide of element X, we will first write the valency of group2 and then on the basis of valency, we will write the formula of its chloride and oxide.

Complete answer: As per the question, if any element is in group2, that means the valency of that element is 2, or $X = 2$ .
(a) So, the formula of its chloride is $XC{l_2}$ ,
since chlorine has valency 1.
(b) And, the formula of its oxide is $XO$ .
since, oxygen has valency 2.
The alkaline earth metals are a set of six chemical elements in the periodic table's group 2. Beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra) are the elements involved (Ra). At standard temperature and pressure, the elements have extremely similar properties: they are all lustrous, silvery-white, and moderately reactive metals.
Beryllium, magnesium, calcium, strontium, barium, and radium are all members of Group 2. With the exception of beryllium, these elements are known as alkaline earth metals. These metals are known as alkaline earth metals for two reasons: Their oxides are found in the earth's crust and are extremely heat resistant.

Note:
The Group 2 elements, with the exception of beryllium, are typical metals: (a) At ambient temperature and pressure, comparatively soft but harder than group 1 metals, glossy solids that are good heat and electricity conductors (b) Melting point is moderately high.