Answer the following questions : (Any Five) Considering the elements of period 3 in the modern periodic table, answt the following questions : (A) Name the element in which all the shells are completely filled will electrons. (B) Name the element which has one electron in the outermost shell. (C) State the most electronegative element in this period,
Answers
Answer:
(a) Neon has two shells which are completely filled. The elements in Group 18 of the periodic table are known as the noble gases. These elements are also known as the inert gases, which is a very appropriate name for them since this group of elements exhibits extremely inert chemical behaviour.
(b) Elements of group I have one electron in their outermost shells. So, Lithium, Sodium, and Potassium are the 3 elements that have a single electron in their outermost orbit.
(c) Electronegativity varies in a predictable way across the periodic table. Electronegativity increases from bottom to top in groups, and increases from left to right across periods. Thus, fluorine is the most electronegative element, while francium is one of the least electronegative.
a) Neon has two shells which are completely filled. The elements in Group 18 of the periodic table are known as the noble gases. These elements are also known as the inert gases.
b) Hydrogen (H), lithium (Li), and sodium (Na), as group 1 elements, have just one electron in their outermost shells.
c) Fluorine is the most electronegative element, while francium is one of the least electronegative.
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