Question

1-Write the atomic symbols of Calcium, potassium,
Zinc, Hydrogen, Helium, Copper, Phosphorus,
Nitrogen, Iron, Aluminium, Sodium.
2-Write the atomic mass of Nitrogen, Sodium,
Hydrogen, Carbon.
3-Write the ionic symbol of Hydroxide ion, Nitrate,
Hydrogen Carbonate, Phosphate, Sodium.
4-What are Polyatomic ions. Give example.

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Answer 1

Answer:

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Explanation:

Group 1A — The Alkali Metals

1A2A3A4A5A6A7A8A(1)(2)(13)(14)(15)(16)(17)(18)3B4B5B6B7B—8B—1B2B(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)1HHe2LiBeBCNOFNe3NaMgAlSiPSClAr4KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr5RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe6CsBaLa HfTaWReOsIrPtAuHgTlPbBiPoAtRn7FrRaAc RfDbSgBhHsMtDsRgUub—Uuq————6 CePrNdPmSmEuGdTbDyHoErTmYbLu7 ThPaUNpPuAmCmBkCfEsFmMdNoLr

 

Group 1A (or IA) of the periodic table are the alkali metals:  hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).  These are (except for hydrogen) soft, shiny, low-melting, highly reactive metals, which tarnish when exposed to air.  The name comes from the fact that when these metals or their oxides are dissolved in water, a basic (alkaline) solution results.  Because the alkali metals are very reactive, they are seldom (if ever) found in their elemental form in nature, and are usually found as ionic compounds (except for hydrogen).

1. ion of water from sea water.  Sodium chloride is subjected to electrolysis in an apparatus called a Downs cell, which produces sodium metal and

Answer 2

Explanation:

zinc. zn

hydrogen h

helium. he

copper. cu

Phosphorus p

nitrogen. n

iron. Fe

aluminum. Al

sodium. na

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