Question

The atomic radius decreases in moving from left to right along a period in the modern periodic table.This is due to
a decrease in number of shells along a period
an increase in nuclear charge which tends to pull the electrons closer to the nucleus
an increase in valence electrons and number of shells
an increase in atomic number and number of valence electrons
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Answer 1

Answer:

Periodic trends are specific patterns that are present in the periodic table that illustrate different aspects of a certain element, including its size and its electronic properties. 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. These trends exist because of the similar atomic structure of the elements within their respective group families or periods, and because of the periodic nature of the elements.

Explanation:

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