Question

Can
you
think of the advantages of writing on a hard
Surface ? And what could have been the difficulties?​

Answer 1

Answer:

1. Atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. 2. ... 1.The mass number, also called atomic mass number or nucleon number, is the total number of protons and neutrons in an atomic nucleus.

Explanation:

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