GROWTH DEVELOPMENT CHILD
FORMATIVE ASSESSMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the name of the element found in Group 16, Period 3?
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Selenium
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Sulfur
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Silicon
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None of the above
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Explanation:
Detailed explanation-1: -The element that belongs to period 3 and group 16 has valency 2 since it has 2 electrons less to complete octet. Hence the element is sulphur and it is a non-metal.
Detailed explanation-2: -oxygen group element, also called chalcogen, any of the six chemical elements making up Group 16 (VIa) of the periodic classification-namely, oxygen (O), sulfur (S), selenium (Se), tellurium (Te), polonium (Po), and livermorium (Lv).
Detailed explanation-3: -Selenium (Se) is an element in group 16. Selenium is the first nonmetal in period 4, with properties similar to sulfur. Selenium is quite rare in pure form in nature, mostly being found in minerals such as pyrite, and even then it is quite rare.
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