How can we use patterns on the periodic table to predict an element’s structure and reactivity?

Generally, it can be stated that for the elements on the left of the periodic table (first two groups) the reactivity of the elements increases as we go down a group.

Conversely, reactivity decreases down the group for elements in group 7.

It is also observed that the reactivity of the elements in the periodic table decreases from left to right, until group 6 is reached, after which it starts to increase once again, and then the reactivity becomes negligible when group 8 is reached.

Explanation:

c most likely

hop this let me know if it is wrong

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).