Question

Calculate the valency of elements from the

atomic numbers 1-20. Write the number of

electrons, protons, neutrons and atomic mass

of each element. Classify them as metal, non

metal or metalloid.​

Answer 1

Explanation:

Original title: Agreement Between the Settlers of New Plymouth

Created: November 21, 1620

Repealed: first repealed in 1686; reinstated in 1689 and repealed again in 1691