What is a period in the periodic table?

Answer 1

A period on the Periodic Table is a horizontal row of elements. As we look across a given row of elements, we see atomic number increasing by one for each element we encounter. Further, what we are looking at is the "filling in" of the electron shells leading up to a completely full outer shell for the element at the far right of the period. No elements in a period have a full outer electron shell (valence shell) except the last one. We then start over with the next higher atomic number and begin a new period of the periodic table. Use the link below to check facts and learn more.

Answer 2

A period is a horizontal row in the periodic table. So far, there are 7 of them. Each period shows patterns as you go across it(left to right). On of the must-know patterns is that the number of period indicates how many orbitals (or energy levels) the elements in that period have. Other patterns include atomic radius and ionic radius.

Answer 3

In the periodic table of the elements, elements are arranged in a series of rows so that those with similar properties appear in vertical columns. This arrangement reflects the periodicrecurrence of similar properties as the atomic number increases. For example, the alkaline metals lie in one group (group 1) and share similar properties, such as high reactivity and the tendency to lose one electron to arrive at the noble gas electronic configuration.

Modern quantum mechanics explains these periodic trends in properties in terms of electron shells. As atomic number increases, shells fill with electrons in approximately the order shown below. The filling of each shell corresponds to a row in the table. 1s 2s 2p 3s 3p 3d 4s 4p 4d 4f 5s 5p 5d 5f 6s 6p 6d 7s 7p

In the s-block and p-block of the periodic table, elements within the same period generally do not exhibit trends and similarities in properties (vertical trends down groups are more significant). However in the d-block, trends across periods become significant, and in the f-block elements show a high degree of similarity across periods (particularly the lanthanides).[hide]v • d • e

Periodic tablesLayoutsStandard · Inline f-block · Vertical · Full names · Names and atomic weights · Text for last · Large table · Metals and nonmetals · Blocks · Valences · Extension beyond the 7th period · Electron configurations · Atomic weights · Electronegativities · Alternatives · Crystal structure

Lists of elements byName · Atomic symbol · Atomic number · Atomic weight · Name etymology (after places, after people) · Discovery

Boiling point · Melting point · Density · Oxidation state · Abundance (in humans) · Nuclear stability · Hardness

Groups1 (Alkali metals) · 2 (Alkaline earth metals) · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10 · 11 · 12 · 13 (Boron group) · 14 (Carbon group) · 15 (Pnictogens) · 16 (Chalcogens) · 17 (Halogens) · 18 (Noble gases)

Periods1 · 2 · 3 · 4 · 5 · 6 · 7 · 8

Other element categoriesMetals · Transition metals (1st row · 2nd row · 3rd row · 4th row) · Metalloids · Nonmetals · Lanthanoids · Actinoids · Rare earth elements · Platinum group metals (PGMs) · Post-transition metals

Blockss-block · p-block · d-block · f-block

The periodic table of elements is organized by periods and families or groups this means that the periods stand for the valence electrons or negatively charged atoms known as electrons in the electrons shells in the electron cloud.

Answer 4

A period on the periodic table is a horizontal row. The atoms in this row show a trend in their width, and in the amount of work needed to make them an ion, among the few other similarities.

Answer 5

In the periodic table of the elements, each numbered row is a period.