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П-блок элементүүд нэгээс илүү исэлдэлтийн төлөвтэй байж болох ч энэ нь тохиолдоход хамгийн түгээмэл исэлдэлтийн төлөв хоёр нэгжээр тусгаарлагддаг. Үндсэн бүлгийн элементүүдийн тодорхой жишээ нь гели, лити, борон, нүүрстөрөгч, азот, хүчилтөрөгч, флюорин, неон зэрэг орно. Үндсэн бүлгийн элементүүдийн ач холбогдол
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