The positions of elements X, Y, Z in the Periodic Table are given below. Group 16 Group 17 - X - - Y Z Which is more electronegative between X and Z.

Element X is more electronegative than element Z . The electronegativity decreases as we move down group 17 because of the increase in nuclear radii. In group 17, fluorine is the most electronegative element. Halogens have high electronegativity. The tendency of an atom to attract electrons or a bonding pair of electrons is known as electronegativity.

The positions of elements X, Y, Z in the Periodic Table are given below. Group 16 Group 17 - X - - Y Z Name the element larger in size between Y and Z.

The atomic size of the elements decreases along a period, so element Y is larger in size than element Z . The atomic number increases within the same period while moving from left to right which in turn increases the effective nuclear charge. The increase in attractive forces reduces the atomic radius of elements. Atomic radius is a typical distance from the centre of the nucleus to the boundary of the surrounding shells of electrons.

The positions of elements X, Y, Z in the Periodic Table are given below. Group 16 Group 17 - X - - Y Z What will be the valency of elements X and Y?

The valency of an element X is - 1 , and Y is - 2 . The number of valence electrons in the element X is 7 and Y is 6 as they belong to groups 17 and 16 respectively. If the number of electrons is in the outermost shell are 5, 6, 7 then that element can accept 1, 2 or 3 electrons having -1, -2, -3 valency and that element will show nonmetallic character. The number of electrons that must be lost or gained by an atom to obtain a stable electron configuration.

A part of the Periodic Table is given below: From the above table, answer the following question. Which element is most metallic?

Potassium is most metallic. Metallic character increases down the group because as the number of shells increases the distance between the nucleus and outermost shell increases, thus the force of attraction between nucleus and valence electrons decreases. Conversely, the metallic character decreases across the period because the nuclear charge increases as the shells remaining the same. So, the tendency to lose electrons decreases. So, the metallic character decreases, and the nonmetallic character increases.

A part of the Periodic Table is given below: From the above table, answer the following question. Which element is most nonmetallic?

Fluorine ( F ) is the most nonmetallic element. The metallic character decreases across the period because the nuclear charge increases as the shells remaining the same. So, the tendency to lose electrons decreases. So, the metallic character decreases, and the nonmetallic character increases. Conversely, metallic character increases down the group because as the number of shells increases the distance between the nucleus and outermost shell increases, thus the force of attraction between nucleus and valence electrons decreases.

A part of the Periodic Table is given below: From the above table, answer the following question. Which element is an inert gas?

Argon is an inert gas. All the elements in group 18 are unreactive gases. They are so unreactive that they are called noble gases. Their lack of activity makes them very useful. Argon is used when aluminium is being welded to stop it from catching fire.