Why mendeleev might have grouped lithium (li), sodium (na), potassium (k), rubidium (rb), and cesium (cs) together ?

explanation: they react so strongly because they all readily lose an electron to form lithium, sodium, potassium, rubidium, and cesium are all part of a group called the alkali metals. they are all found in group 1 of the periodic table. they are all soft metals in elemental form and they all react violently with water.

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under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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