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Differentiate mass number from atomic number.
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The atomic number of an element is 9, it has 10 neutrons. Find the element from the periodic table. What will be its mass number?
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The atomic number and the mass number of an element is 26 and 56 respectively. Calculate the number of electrons, protons and neutrons in its atom. Draw the structure.
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What is common salt? Name the elements present in it. Write the formula of common salt. What are the atomic number and the mass number of the elements? Write the ions in the compound.
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______ is the first satellite launched by India.
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Match the following
| 1. | Rohini | GSLV-Mark III |
| 2. | GSAT-14 | GSLV Mark III M1 |
| 3. | GSAT-19 | SLV-3 |
| 4. | Chandrayaan-2 | PSLV-XL C25 |
| 5. | Mangalyaan | GSLV-D5 |
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Which country launched the world’s fi rst artifi cial launch vehicle?
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Give the expansions of PSLV and GSLV
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Which of the following is the strongest?
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Match the Following
| A | B |
| Nylon | Thermoplastic |
| PVC | Thermosetting plastic |
| Bakelite | Fibre |
| Teflon | Wood pulp |
| Rayon | Non-stick cookwares |
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Nylon: melts on heating: Silk: ______.
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In the presence of water, the ignition temperature of paper is ______.
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How many types of combustion are there?
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The shortest distance between the earth and the sun is called as ______ position.
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The largest distance between the earth and the sun is called as ______ position.
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The materials with higher density are called ______.
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The materials with lower density are called ______.
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The area of irregularly shaped figures can be calculated with the help of a ______.
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The SI unit of volume is ______.
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