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8-sinf Kimyo olimpiada №3

Yanvar 3, 2023

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8-sinf Kimyo olimpiada №3

30.12.2022 yil oo.uzedu.uz

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Quyidagi ifodalardan qaysilari davriy jadvaldagi elementlar uchun noto’g’ri. 1) guruh bo’ylab elektromanfiylik qiymati ortadi 2) davr bo’ylab elektronga moyillik kamayadi 3) guruh bo’ylab ionlanish potensiali kamayadi. 4) davr bo’ylab metallik xossasi kamayadi

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Mol nisbatlari 5:2 bo’lgan CD₄ va H₂O tarkibidagi neytronlar soni ayirmasi5 ga teng bo’lsa aralashmaning moli yig’indisini toping.

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