Question

what are 1st 20 elements?

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Answer 1

Answer:

In order of increasing atomic number, the first 20 elements and their symbols are:

In order of increasing atomic number, the first 20 elements and their symbols are:Hydrogen (H)

In order of increasing atomic number, the first 20 elements and their symbols are:Hydrogen (H)Helium (He)

In order of increasing atomic number, the first 20 elements and their symbols are:Hydrogen (H)Helium (He)Lithium (Li)

In order of increasing atomic number, the first 20 elements and their symbols are:Hydrogen (H)Helium (He)Lithium (Li)Beryllium (Be)

In order of increasing atomic number, the first 20 elements and their symbols are:Hydrogen (H)Helium (He)Lithium (Li)Beryllium (Be)Boron (B)

In order of increasing atomic number, the first 20 elements and their symbols are:Hydrogen (H)Helium (He)Lithium (Li)Beryllium (Be)Boron (B)Carbon (C)

In order of increasing atomic number, the first 20 elements and their symbols are:Hydrogen (H)Helium (He)Lithium (Li)Beryllium (Be)Boron (B)Carbon (C)Nitrogen (N)

In order of increasing atomic number, the first 20 elements and their symbols are:Hydrogen (H)Helium (He)Lithium (Li)Beryllium (Be)Boron (B)Carbon (C)Nitrogen (N)Oxygen (O)

Explanation:

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