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Periodic-table
Question | Answer |
---|---|
What is the weight of an element? | Average atomic mass |
What is atomic number? | Number of proton |
Does atomic number change? | No, never |
What do we call a vertical column of the periodic table? | Group or Family |
How many groups are there in a standard periodic table? | 18 |
Characteristics of each group | Each group has similar chemical and physical properties. Each group has same numbers of valence electron. |
What do we call each row in the periodic table? | Period |