Jenis-Jenis Unsur

Flashcard
•
Science
•
8th Grade
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Medium
maulida pangastuti
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19 questions
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1.
FLASHCARD QUESTION
Front
Apa itu unsur?
Back
Unsur adalah zat tunggal atau zat murni yang tidak dapat diuraikan lagi menjadi zat yang lebih sederhana melalui reaksi kimia.
2.
FLASHCARD QUESTION
Front
Berapa banyak macam unsur yang telah ditemukan di bumi?
Back
Lebih dari 100 macam unsur.
3.
FLASHCARD QUESTION
Front
Sebutkan tiga jenis unsur berdasarkan sistem periodiknya!
Back
Unsur logam, semilogam, dan nonlogam.
4.
FLASHCARD QUESTION
Front
Apa sifat-sifat dari unsur logam?
Back
Unsur logam berwujud padat, berwarna putih mengkilap/keperakan/abu-abu/kuning, penghantar listrik yang baik, mempunyai titik didih atau titik leleh yang tinggi, serta dapat dibentuk menjadi lempengan atau lembaran.
5.
FLASHCARD QUESTION
Front
Sebutkan contoh unsur logam!
Back
Aluminium (Al), barium (Ba), besi (Fe), emas (Au), kalium (K), kalsium (Ca), perak (Ag), kromium (Cr), magnesium (Mg), mangan (Mn), natrium (Na), dan nikel (Ni).
6.
FLASHCARD QUESTION
Front
Apa itu unsur semilogam?
Back
Unsur semilogam disebut juga metaloid karena dapat bersifat layaknya unsur logam maupun nonlogam.
7.
FLASHCARD QUESTION
Front
Apa sifat-sifat dari unsur semilogam?
Back
Unsur semilogam berwujud padat, bersifat semikonduktor, tidak dapat menghantarkan listrik dengan baik pada suhu rendah (isolator), dan dapat menghantarkan listrik dengan baik pada suhu tinggi (konduktor).
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