using the peroidis table, can you determine that a potassium atom has one valence electron?

Question

this is a true or false queston

Answer 1

There is no such thing as a PEROIDIS table.
You need a PERIODIC table of elements.

Answer 2

Yes, as long as you do a little thinking. For potassium, the atomic number is 19, this means there are 19 protons and electrons in the atom. Thinking of the Bohr model diagram, the first shell takes 2 electrons, the second takes 8 ( thats down to 9 electrons now), the third shell can hold another 8. So now we arrive at the valence Shell, well subtract 2,8, and 8 from 19 and you can see that there is indeed one valence electron in the valence shell.

For most of the first elements you can also refer to the ion charge (the number in the top right corner of the box) but there is many exceptions to this (such as silicon for instance).

Answer 3

Yes, there is a relationship between the group (column) A numbers and the number of valence electrons. For example, Potassium is in group 1A therefore it has 1 valence electron; Carbon is in group 4A therefore it has 4 valence electrons.

In addition, the period (row) relates to the energy level. For example, Hydrogen is is the first period and therefore has one energy level.

Answer 4

Yes , because it's in Group 1. Everything in Group 1 has got one electron in the outer orbital.

Answer 5

It is not stated as that, but it is true.
Potassium is in the first column of the table.