Science, asked by valancy4968, 9 months ago

Sate modern period law B) how atomic size changes along period and why

Answers

Answered by vish143690

Answer:

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Explanation:

The modern Periodic law can be stated as:

“The physical and chemical properties of the elements are periodic functions of their atomic numbers”.

The atomic number is equal to the number of electrons or protons in a neutral atom.

Within a period, protons are added to the nucleus as electrons are being added to the same principal energy level.

These electrons are gradually pulled closer to the nucleus because of its increased positive charge.

Since the force of attraction between nuclei and electrons increases, the size of the atoms decreases.

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