Explain how elements are arranged on the periodic table. what does the table tell you when you read it like sentences in a book - left to right, and to bottom.

Explanation:

In periodic table:

Elements are arranged according to their atomic number in increasing order.When we move left to right we move along a period.The period in the periodic table tell us about the principal quantum number,(n).When move from top to bottom we are moving in group. The group in the periodic table tell us about the number of the valence electrons present in the valence shell of the elements of the particular group.

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na