Question

question 83 (1 point)
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cr and cs represent the following elements respectively:

1. cerium and celsium
2. cupprium and calcium
3. chromium and cesium
4. cuprum and curium

Explanation:

To solve this, we recall the chemical symbols for elements. Chromium has the symbol Cr, and Cesium has the symbol Cs. Let's analyze each option:

• Option 1: Cerium is Ce, and "Celsium" is incorrect (Cesium is Cs), so this is wrong.
• Option 2: Copper (Cuprum) is Cu, Calcium is Ca, so this is wrong.
• Option 3: Chromium (Cr) and Cesium (Cs) match, so this is correct.
• Option 4: Cuprum (Copper) is Cu, Curium is Cm, so this is wrong.

Answer:

1. Chromium and Cesium