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1 what do you mean by Valence Electron? Find valency of oxygen and Silicon 2 Give an example of Diatomic and Triatomic molecules and state number of atoms present in them.3. What are vascular bunddles? Name them.4.what are the name the substance which make the cell wall of fungi and plant5. Why HIV AIDS is not a curable disease6. What the slope of velocity time graph gives? show it7. Write the unit ofa) mass. b) gravitational constant |
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Answer» ce electrons are the electrons present on the last shell or valence shell of an atomValency of oxygen - (-2)Valency of silicon - 42 Diatomic - 2 atoms present - oxygen TRIATOMIC - 3 atoms present - nitrogen 3 The transporting tissues of plants are called vascular bundles COMPRISES Xylem and Phloem4 cellulose5 It is not curable because no medicine has yet been found and the DISEASES cause genetic disorders 6 The SLOPE of velocity time graph gives acceleration 7 mass - Kg gravitational constant - m/s^2 |
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