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Question
Name the following:
Two atoms having the same number of protons and electrons but different number of neutrons.
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Solution
Hydrogen and carbon
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RELATED QUESTIONS
Define a chemical bond.
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?
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| Sodium | Phosphorus | Carbon | |
| Formula of chloride | |||
| Nature of bonding | |||
| Physical state of chloride |
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State the type of bonding in the following molecules.
Calcium oxide
Draw the geometric atomic structure of the following atom showing the number of electrons, protons and neutrons in them:
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______ is the only noble gas that does not have eight electrons in its valence shell.
