How do elements change in the periodic table?

Answer 1

The elements of the Periodic Table increase in atomic number as you move across and down. This indicates more protons, and a larger atomic nucleus. The number of electron shells increases as well, with elements with filled valence shells at the right (noble gases). Also, generally elements become less reactive as it moves from the left to the right.
As elements go from left to right across the Periodic Table, each element has one more proton and one more electron than the element to its immediate left. This affects valance (or outer shell) electrons. The column on the extreme left has just one valance electron, then the next column has two, the next has three. There isn't a smooth, uninterrupted progression from one valance electron to eight, on the far right, because the transition state elements, which are all metals, intrude into the sequence (this happens because some atoms have incomplete inner electron shells, rather than filling each shell before starting the next shell). But aside from that complication, elements go from metals on the left to nonmetals on the right, ending up with the noble gas elements on the extreme right.

Answer 2

The elements of the Periodic Table increase in atomic number as you move across and down. This indicates more protons, and a larger atomic nucleus. The number of electron shells increases as well, with elements with filled valence shells at the right (noble gases). Also, generally elements become less reactive as it moves from the left to the right.
As elements go from left to right across the periodic table, each element has one more proton and one more electron than the element to its immediate left. This affects valance (or outer shell) electrons. The column on the extreme left has just one valance electron, then the next column has two, the next has three. There isn't a smooth, uninterrupted progression from one valance electron to eight, on the far right, because the transition state elements, which are all metals, intrude into the sequence (this happens because some atoms have incomplete inner electron shells, rather than filling each shell before starting the next shell). But aside from that complication, elements go from metals on the left to nonmetals on the right, ending up with the noble gas elements on the extreme right.

Answer 3

New elements can be added to the Periodic Table if a new atom is discovered with an unprecedented number of protons, therefore having a new atomic number and its own specific place on the table. However, elements can only be removed or rearranged if an atom of the proposed element cannot be replicated, or if it contains a different number of protons than previously recorded. Elements that are already grounded in their specific place on the periodic table could be changed if it is discovered that a certain isotope is more common than it previously was, and thus changing its ave. Atomic Mass. Nothing else about the element in question can be changed unless it is proved to be severely incorrect.

Answer 4

There are many different changes in elements as you move down the table going across, they move from solid to gas. Also, the have more neutrons/proton as you move across. They also get heavier.

Answer 5

An extra proton is added to the nucleus (an possibly more neutrons) and an extra electron is added to the outer energy levels of the atom for each space going across the periodic table. This causes changes in the chemical properties of the element.

Answer 6

As you move left to right across a period, the size of the nuclei decreases, and the ionization energy also decreases. The number of electrons and the number of electron shells increases.

Answer 7

The atomic number of the element increases by one sequentially and the atomic size decreases from left to right.

Answer 8

There is one more proton in every element as you go right, and provided there are no ions there is one more electron

Answer 9

alkali, akaline earth metals, halogens

Answer 10

chemical properties