What do you predict about an element from its position in the periodic table?

Answer 1

You can predict a lot from its position. As the group number increases, the number of shells also increase. This means that the element can react easily, as the electrons are farther away from the nucleus (as the nucleur charge decreases.) However, across a period, the effective nucleur charge increases, therefore the atomic size decreases the the element is therefore less reactive.

Also, The elements towards the left of the table have more metallic characterisitcs, whil those on the right have non metallic characterisitcs.

We can also find the valency through the periodic table....Valency increases across a period from 1 to 4 and then decreases (1,2,3,4,3,2,1).

Hope it helped :)

Answer 2

You can tell its:

reactivity, characteristics/properties, what kind of element(metal, semimetal) its atomic number

Elements on the Periodic Table are arranged by their atomic number, ranging from 1 (hydrogen) to 118 (ununoctium), though some outdated periodic tables do not show some of the highest-numbered elements that were recently discovered.

The atomic number can tell you a lot about the element for starters. The atomic number is the number of protons in the nucleus of the atom, and for neutrally-charged atoms, this is also the number of electrons (since protons, + charge, and electrons, - charge, cancel each other out). Each element has a unique atomic number, so you can always clearly identify an element by its place on the periodic table.

Also, there are many groups and periods in the table. Groups are the columns of the table, and elements in the same group will exhibit similar characteristics as they all have the same electron configuration in their valence (outermost) shell. Examples of groups include the alkali metals, the halogens, and the noble gases.

Periods are the rows of the table, and signify the different electron orbitals that elements in each period have. Similar atomic trends tend to occur periodically- as you move across the rows, elements will display certain characteristics which repeat every period. Examples of periods include the lanthanoids and actinoids (both usually shown as blocks at the bottom of periodic tables).

^this doesnt answer the question!!