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Sifat Keperiodikan Unsur

Video Quiz

Played 2

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Mempelajari sifat keperiodikan unsur dengan menyenangkan

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Indonesia

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Sifat Keperiodikan Unsur
 

Sifat Keperiodikan UnsurOnline version

Mempelajari sifat keperiodikan unsur dengan menyenangkan

by Nauroh Tsaabitah
QR
1

Apa yang dimaksud dengan sifat keperiodikan unsur?

2

Bagaimana atom jari-jari berubah saat bergerak dari kiri ke kanan dalam satu periode pada tabel periodik!

3

Mengapa energi ionisasi cenderung meningkat dari kiri ke kanan dalam satu periode?

4

Bagaimana afinitas elektron berubah dalam satu golongan dari atas ke bawah?

5

Jelaskan alasan mengapa keelektronegatifan unsur menurun ketika bergerak dari atas ke bawah pada satu golongan!

Explanation

Sifat atom yang berubah secara teratur dan berulang ketika unsur-unsur disusun berdasarkan kenaikan nomor atom dalam tabel periodik

Jari-jari atom semakin mengecil karena muatan inti bertambah namun jumlah kulit elektron tetap sama sehingga elektron tertarik lebih kuat ke inti.

Karena atom jari-jari semakin kecil sehingga gaya tarikan inti terhadap elektron terluar semakin kuat, sehingga diperlukan energi lebih besar untuk melepas elektron

Afinitas elektron menurun dari atas ke bawah karena jari-jari atom semakin besar sehingga elektron tambahan kurang kuat ikatannya

Karena jari-jari atom semakin besar sehingga elektron lain lebih sulit ditarik oleh inti atom

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