What does the period number and group number represent?

What does the period number and group number represent?

Groups and periods are two ways of categorizing elements in the periodic table. Periods are horizontal rows (across) the periodic table, while groups are vertical columns (down) the table. Atomic number increases as you move down a group or across a period.

What is the group number of the element in the periodic table?

Groups are numbered 1–18 from left to right. The elements in group 1 are known as the alkali metals; those in group 2 are the alkaline earth metals; those in 15 are the pnictogens; those in 16 are the chalcogens; those in 17 are the halogens; and those in 18 are the noble gases.

What is group number?

Group number signifies the number of electrons in the outermost shell of an atom of the element. The number of electrons in the outer shell of all elements in one group is same, which implies that. They have the same valency and same chemical properties.

What are the elements in group 2 called?

Group 2A (or IIA) of the periodic table are the alkaline earth metals: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).

How do you find a group number?

Complete step by step answer:

  1. If the element is in s block, then the group number is equal to the number of valence electrons.
  2. If the element is in the p block, then the number of the group can be determined by the formula: (number of valence electrons + 10).

What is group number in chemistry?

Group, in chemistry, a column in the periodic table of the chemical elements. This similarity in both the composition and structure of their atomic valence shells implies a corresponding similarity in both their chemical and physical properties. Groups are numbered from 1 to 18.

How do you identify the group number and period of an element?

If you are given with the atomic number of an element you can find it’s period number and group number. The period number is related to the number of electron occupied shells in the element and the period number is linked to its valence electrons.

What are Group 4 elements called?

Group 4 is the second group of transition metals in the periodic table. It contains the four elements titanium (Ti), zirconium (Zr), hafnium (Hf), and rutherfordium (Rf). The group is also called the titanium group or titanium family after its lightest member.