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प्रश्न
How many atoms of each kind are present in the following molecule:
Calcium oxide
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उत्तर
Calcium oxide (CaO) has one atom of calcium and one atom of oxygen. The calcium atom valence shell has two electrons. As a result, it contributes two electrons to complete the octet, while oxygen requires two electrons to complete the outermost shell.
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संबंधित प्रश्न
Mention the basic tendency of an atom which makes it to combine with other atoms.
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is a non-metal.
Five atoms are labelled from A to E.
| Atoms | Mass No. | Atomic No. |
| A | 40 | 20 |
| B | 19 | 9 |
| C | 7 | 3 |
| D | 16 | 8 |
| E | 14 | 7 |
(a) Which one of these atoms:
(i) contains 7 protons,
(ii) has an electronic configuration 2, 7?
(b) Write down the formula of the compound formed between C and D.
(c) predict which are: (i) metals, (ii) non-metals?
(i) How many atoms of each kind are present in the following molecules: calcium oxide, chlorine, water, carbon tetrachloride?
(ii) How many electrons are required for their octet structure?
Fill in the blanks.
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orbit
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Draw the geometric atomic structure of the following atom showing the number of electrons, protons and neutrons in them:
\[\ce{^39_19K}\]
Draw the geometric atomic structure of the following atom showing the number of electrons, protons and neutrons in them:
\[\ce{^40_20Ca}\]
