Created by Le Thi Thanh Mai PGD Phu Xuyen
about 2 years ago
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Hydrogen
Helium
Lithium
Beryllium
Boron
Carbon
Nitrogen (Nitơ)
Oxygen
Fluorine
Neon
Sodium (Natri)
Magnesium
Aluminium (Nhôm)
Silicon
Phosphorus
Sulfur (Lưu huỳnh)
Chlorine
Argon
Potassium (Kali)
Calcium