Question

learn and write down the assumptions mod in determining the valency of an element​

Answer 1

Answer:

learn and write down an essay on mod mod

Answer 2

Answer:

1.The first(and easiest) is simply to consult the periodic table. The elements are sorted into groups, and the elements in the groups(1–8 respectively) have the same valency as others in their group. For example, all of the elements in group 8 have eight electrons(high stability).

2 The second method is to look at the total number of electrons, and then calculate the valency(if you don’t know, remember to look at the atomic number - the number of electrons is always equal to the number of protons). The valency of an atom is equal to the number of electrons in the outer shell if that number is four or less.

3.You can also calculate the valency of multi-element molecules the same way. For example, to determine the valency of, say, phosphorus tetraoxide, you would multiply the total valency of the four oxygen atoms (valency 2) and subtract that from the valency of the phosphorus atom (valency 5) to get the solution of 3.