Question

trends of modern periodic table

Answer 1

Major periodic trends include: electronegativity, ionization energy, electron affinity, atomic radius, melting point, and metallic character. Periodic trends, arising from the arrangement of the periodic table, provide chemists with an invaluable tool to quickly predict an element's properties.

Answer 2

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Trends in the Modern Periodic Table are:-

⏩ Valency.

⏩ Atomic Size.

⏩ Metallic and Non-Metallic properties.

${\mathfrak{\underline{Valency}}}$

The valency of an element determined by the number of valence electrons present in the outermost shell of its atom.

⏺ Valency down a group same.

⏺ Valency across a period (left to right) varies ie. first increases then decreases.

${\mathfrak{\underline{Atomic\:Size}}}$

The atomic size is the distance between the center of the nucleus and the outermost shell of an isolated atom.

⏺Across a period, Left to right atomic size decrease and Right to left increases.

⏺Atomic size increase down a group.

${\mathfrak{\underline{Metallic\:and\:Non-metallic\:properties}}}$

In the modern periodic table, a zig-zag line separates metals from non-metals.

⏺ Metal tend to lose electrons while forming bonds. So they are electropositive in nature.

⏺️ Non-metal tend to form bonds by gaining electrons. So they are electronegative in nature.

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