Page 19 - Science E-Book Prep.2 2024-2025 1st term_Neat - Copy
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Chemical -They are monovalent
properties: Because they have one electron intheir outermost
energy level.
-They tend to lose the outermost electron
duringchemical reaction forming +ve ion
M(alkali metals) -e + + (+ve Ion carries)
One +ve charge
-They are active elements so, they kept under the
surface of kerosene or paraffin oil
in each group of periodic table as we move from up
to down the chemical activity increases.
cesium is the most active metal
bec. it has the largest atomic size
2nd Prep. First Term 26
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