Give Easy Tricks to remember atomic mass first 20 elements.

1.	Give Easy Tricks to remember atomic mass first 20 elements.
Answer» Usually element (till calcium) atomic mass is just double of its atomic number like it, the number of oxygen is 8 and its atomic mass is 16. But elements like Li,Be,B,F,Na,Al,P,Cl,Ar &,K has atomic mass = Atomic number * 2 +1 Example AI = atomic number 2 + 1 = 132+1 = 27 and this is its atomic mass. Thus, you need to remember only these elements like Li, Be, B etc . and then you can find the atomic mass of these elements easily.

Answer»

Usually element (till calcium) atomic mass is just double of its atomic number like it, the number of oxygen is 8 and its atomic mass is 16.

But elements like Li,Be,B,F,Na,Al,P,Cl,Ar &,K has atomic mass = Atomic number * 2 +1

Example AI = atomic number *2 + 1 = 13*2+1 = 27 and this is its atomic mass.

Thus, you need to remember only these elements like Li, Be, B etc . and then you can find the atomic mass of these elements easily.

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