Unsur magnesium (Mg) memiliki nomor atom 12 dan nomor massa 24. Notasi atom yang benar untuk unsur magnesium adalah:

MINI TRY OUT BIMBINGAN OSN SMAN 8 BNA

Quiz
•
Information Technology (IT)
•
8th Grade
•
Hard
Ainul Mahendra
Used 2+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 6 pts
²⁴Mg₁₂
²⁴Mg₁₁
¹²Mg₂₄
²³Mg₁₂
¹²Mg₂₃
2.
MULTIPLE CHOICE QUESTION
30 sec • 6 pts
Unsur dengan konfigurasi elektron 2, 8, 8, 2 berada di golongan dan periode berapa?
Golongan IIA, Periode 4
Golongan IIA, Periode 3
Golongan IIIA, Periode 4
Golongan IIIA, Periode 3
Golongan IVA, Periode 4
3.
MULTIPLE CHOICE QUESTION
30 sec • 6 pts
Jika elektron terakhir suatu atom memiliki bilangan kuantum n = 3, l = 1, mₗ = 0, dan s = -½, maka elektron tersebut berada di:
Subkulit 3s
Subkulit 3p
Subkulit 3d
Subkulit 4p
Subkulit 2p
4.
MULTIPLE CHOICE QUESTION
30 sec • 6 pts
Dalam satu periode, sifat logam dari kiri ke kanan dalam tabel periodik akan:
Meningkat
Menurun
Tetap
Meningkat lalu menurun
Menurun lalu meningkat
5.
MULTIPLE CHOICE QUESTION
30 sec • 6 pts
Unsur dengan energi ionisasi terbesar pada periode ketiga adalah:
Natrium (Na)
Aluminium (Al)
Fosfor (P)
Klorin (Cl)
Argon (Ar)
6.
MULTIPLE CHOICE QUESTION
30 sec • 7 pts
Unsur berikut yang memiliki elektronegativitas paling tinggi dalam satu golongan adalah:
Fluorin (F)
Klorin (Cl)
Bromin (Br)
Iodin (I)
Astatin (At)
7.
MULTIPLE CHOICE QUESTION
30 sec • 7 pts
Unsur transisi Y memiliki nomor atom 29. Konfigurasi elektron yang tepat untuk unsur ini sesuai dengan aturan Aufbau adalah:
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s1
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁹
1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁹ 4s¹
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s¹
1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁹
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