Will mark !
a proton has charge.

positive charge of 1

Explanation:

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Positive

The charge of the proton is a positive charge. The nucleus of the atom is made up of the positively charged protons and negatively charged neutrons. The positive charge that is carried by the proton is called a +1 elementary charge, the exact opposite of the negative charge that is carried by a single electron.

the correct answer is a

"the periodic table is arranged in order of atomic number."