How can u tell if atom's charge is positive or negative by using the periodic table?

Answer 1

Well, atoms are neutral, but when they become ions, the nonmetals on the right side tend to become anions (negatively charged), while the metals on the left and in the middle tend to become cations (positively charged).

Answer 2

Remember the octet rule: so for atoms in the first four main groups (1, 2, 13, 14) it's easier to lose electrons to acquire the electronic configuration of the noble gas in the preceding period. Atoms that have 5 or more valence electrons (groups 15-18), take up the missing electrons more easily to form the octet structure of a noble gas in the same period. Transition metals (groups 3-12) have a different behavior and most of them do not follow an easy rule.
Another way to look at it is if you know if it's an element is a metal or gas. Metals tend to have positive charges, gases, the opposite (also the octet rule can explain their behavior). Metalloids are in the middle

Answer 3

If you need oxidation charges, it is different. The most helpful way is that metals are positive and non metals are most times negative.

The elements in groups 1 - 5 normally have positive oxidation numbers. Elements 6-7 are negative. Noble Gases do not have oxidation charges.

Most atoms in their ground state have no charge. Only when they interact with other elements (normally metals and non metals) do they get a charge.

All metals become negative, because they give away electrons and almost all non metals become positive because they take them away.

Covalent electrons and charges as well?

maybe this should be asked more precisely.

Answer 4

An atom's charge is always neutral.

It is an ion that carries a charge. The elements on th eleft side of the periodic table tend to lose electrons and become positive ions. On the right side they tend to gain electrons and become negative ions. Th e group most on the right (called either Gr. 18 or 8A) tend to neither gain nor lose electrons.

Answer 5

The periodic chart is columned to have the same number of valence electrons for the elements in the column. The rows tell the "shells" starting at the top (1) and working down. All rows END with 8 electrons in the outer shell, thus the octet rule. Length of rows indicate how much packing occurs in lower shells. SpHt and "equilibrium" are not properties commonly found on the chart, although SpHt of the elements is sometimes. Most SpHt data is for compounds of which there are MANY!

Answer 6

Look at the oxidation number. It's in the periodic table.

Answer 7

metal are positive and nonmetal are negative