Question

atom d element h Tick the most appropriate answer. Which of the following generally cannot exist independently? a. compound b. molecule 2. Which of the following is a triatomic molecule? a. oxygen b. sulphur c nitrogen 3. What is the atomicity of a nitrogen molecule. 20 b. 1 sozone دبیر 2 6. 3 4. Which of the following is a molecule of a compound? b. H₂O S N₂ 5. What is the symbol of helium b. Hg dH a. H C Hm d. Не 6. Which of the following lose electrons to form cations? a metals b. non-metals both a and b d. none of these 7. What are the horizontal rows in the periodic table called? 2. periods b. groups c. columns d. none of these ​

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