Why and how elements are arranged in fourth period
Answers
Answer:
how elements are arrangedinaperiod?
Ans)A period in the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor.
whyelementsarearrangedina period?
Ans) elements in the same column have similar chemical and physical properties, reflecting the periodic law. For example, the alkali metals lie in the first column (group 1) and share similar properties, such as high reactivity and the tendency to lose one electron to arrive at a noble-gas electronic configuration.
Patternsalongaperiodare:
electronegativity increasesincreases.
sheilding effect decreases.
atomic radius decreases.
electron gain enthalpy increases.
metallic character decreases.
ionisation enthalpy increases.
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