39074231
Description
| Question | Answer |
| Give the letter that represents an atom of a noble gas | an atom of a noble gas |
| Give the letter that represents an atom that contains three protons | an atom that contains three protons |
| Give the letter that represents an atom of phosphorus | an atom of phosphorus |
| Give the letter that represents an atom of an element in Group 4 of the Periodic Table | an atom of an element in Group 4 of the Periodic Table |
| Give the letter that represents an atom of an element in Period 3 of the Periodic Table | an atom of an element in Period 3 of the Periodic Table |
| Give the letter that represents an atom with a full outer shell of electrons | an atom with a full outer shell of electrons |
| Complete the sentence to describe a covalent bond. A covalent bond is the electrostatic attraction between a pair of ............... and the .......... of two atoms. | protons / nucleus(es) |
| Suggest, with reference to electronic configurations, the most likely formula of the compound formed between atoms of A and D. | |
| Explain why hydrogen has a very low boiling point. | M1 weak forces (of attraction) between molecules M2 (therefore) little (thermal/heat) energy required to overcome these forces |
| When hydrogen burns in oxygen, heat energy is transferred to the surroundings. State the name given to a reaction in which heat energy is transferred to the surroundings. | exothermic |
| Write a chemical equation to represent the reaction that takes place when hydrogen burns in oxygen. | |
| Describe a chemical test to show that the product is water. | |
| Describe a physical test to show that the product is pure water. | |
| 3iii 3c 4b | ? |
| Indium is a metal in Group 3 of the Periodic Table. (i) Describe the structure and bonding in indium. | M1 positive ions / cations M2 delocalised electrons / sea of electrons M3 crystal / lattice / regular arrangement / array |
| Explain why indium is malleable. | M1 layers/sheets/planes/rows AND (positive) ions / atoms / particles M2 slide (over each other) |
| 12 | |
| 5 11 5 6 5 | |
| more more the same number of | |
| cross in box D (2.8.3) |
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