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Category: STD09 SCIENCE
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Periodic Elements
Class 9 | TN State Board Science Key Concepts Atomic Structure: Periodic Table: Atomic Number (Z): Atomic Mass (Atomic Weight): Valence Electrons: Chemical Bonding: Periodic Trends: Noble Gases: Alkali Metals: Halogens: Transition Metals: Metals vs. Nonmetals: Metalloids: Fill in the Blank Questions Answer the following fill in the blank questions. Key Verify your answers.
Determination of atomic mass
Atomic mass can be determined by applying the following formula. Atomic mass = (w1A1 + w2A2)/(w1+w2) If the weight is given in terms of weight percentage replace w1 as w1% , w2 as w2 % and (w1 + w2) as 100 respectively in the above equation.