Q45Written answer
Complete the following crossword puzzle (Fig. 3.1) by using the name of the chemical elements. Use the data given in Table 3.2.
| Across | Down |
| The element used by Rutherford during his α–scattering experiment | A white lustrous metal used for making ornaments and which tends to get tarnished black in the presence of moist air |
| An element which forms rust on exposure to moist air | Both brass and bronze are alloys of the element |
| A very reactive non–metal stored under water | The metal which exists in the liquid state at room temperature |
| Zinc metal when treated with dilute hydrochloric acid produces a gas of this element which when tested with burning splinter produces a pop sound. | An element with symbol Pb |
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