Metalloids : Those elements which resemble both metals and non-metals are called metalloids. Explanation:As we move down a group atomic size increases.As a result the force of attraction between nucleus valence electron decreases.Hence the tendency to lose electrons to form positive ions increases hence mtallic character increases. True or False: nitrogen and phosphorus are metals. 2) Along a period, the metallic character decreases because the electron releasing tendency of the atoms tends to decrease. Group 13 to 18 comprise non-metals, metalloids and metals. Metallic character increases as you move down an element group in the periodic table. and find homework help for other Periodic Table questions at eNotes Metallic Character. This can be explained in terms of decrease in lionisation energy on going down a group from top to bottom. Metallic and Non-metallic Character : Group 1 to 12 are metals. So more easier an element looses its electron, higher will be its metallic property. As we move from left to right, nuclear charge increases with increase in atomic number. Get an answer for 'Why the metallic or non metallic character of elements vary depending upon their position in the periodic table?' metallic character is governed by the tendency of an element to lose an electron easily. Metallic character decreases as you move across a period in the periodic table from left to right. The noble gases are a special group because of their lack of reactivity. This occurs as atoms more readily accept electrons to fill a valence shell than lose them to remove the unfilled shell. The most reactive nonmetals reside in the upper right portion of the periodic table. Non- metallic character increases from left to right in a period because effective nuclear charge increases from left to right in a period. Due to this effective nuclear charge, the electronegativity increases and the tendency of gaining electrons also increases. Metallic and Non-Metallic Character. Due to this the nuclear force … Non-metallic character relates to the tendency to accept electrons during chemical reactions. It … Metallic character decreases as you move across a period in the periodic table from left to right. Down a group, the number of shells increases, also the atomic size. Since the electrons in larger atoms are farther from the nucleus, the energy required to remove the most loosely-bound electron (its ionization energy) decreases. The atomic radius of elements found at the bottom of group 1 and in group 2 increases, hence, the larger the distance between nucleus and valence electrons is, the weaker the attraction force becomes. They are also called semi-metals, e.g., Boron, Silicon, Germinaium, Arsenic, Antimony, Tellurium and Polonium. By accepting electrons, non-metal atoms change to negative ions (anions). Thus , the metallic character increase does increase as going DOWN a group. 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