what is atomic size trend
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Atomic radius patterns are observed throughout the periodic table. Atomic size gradually decreases from left to right across a period of elements. This is because, within a period or family of elements, all electrons are added to the same shell.
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Atomic size, which is also known as atomic radius, is defined as the distance between the centre of nucleus and the outermost or valence shell.
Various units are used to measure the atomic size:
1. Angstrom
1 Angstrom = 10^(-10) m
2. Picometre
1 Picometre = 10^(-12) m
Atomic size of some elements:
1. Hydrogen ( H ) - 37 pm
2. Lithium ( Li ) - 152 pm
3. Potassium ( K ) - 231 pm
• Atomic size increases down a period whereas it decreases across a group.
Various units are used to measure the atomic size:
1. Angstrom
1 Angstrom = 10^(-10) m
2. Picometre
1 Picometre = 10^(-12) m
Atomic size of some elements:
1. Hydrogen ( H ) - 37 pm
2. Lithium ( Li ) - 152 pm
3. Potassium ( K ) - 231 pm
• Atomic size increases down a period whereas it decreases across a group.
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