What is the period group and block of chlorine?
What is the period group and block of chlorine?
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 block for chlorine?
p-block
| Chlorine | |
|---|---|
| Atomic number (Z) | 17 |
| Group | group 17 (halogens) |
| Period | period 3 |
| Block | p-block |
How do you find the group period and block of an element?
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). 3. If the element is in the d block, then the number of the group can be determined by the formula: numberofelectronsin(n−1)dsubshell + (number of electrons in (n) s subshell).
What are groups and periods Class 11?
The horizontal rows are called ‘periods’ (which go from left to right) and the vertical columns are called ‘groups’ (going from up to down).
What is the chemical formula of chlorine?
Cl2
The chemical formula of chlorine gas is Cl2. It is yellow-green in colour and has an odour which is similar to to the household bleach. It is soluble in water and reacts to form hypochlorous acid and hydrochloric acid.
What is group period?
A period is a horizontal row of the periodic table. A group is a vertical row of the periodic table.
What is a group and period in periodic table?
The columns of the periodic table are called groups. Members of the same group in the table have the same number of electrons in the outermost shells of their atoms and form bonds of the same type. The horizontal rows are called periods.
Why is chlorine in Group 17?
These five toxic, non-metallic elements make up Group 17 of the periodic table and consist of: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). Because the halogen elements have seven valence electrons, they only require one additional electron to form a full octet.
What is the period Number of chlorine?
3
Fact box
| Group | 17 | −101.5°C, −150.7°F, 171.7 K |
|---|---|---|
| Period | 3 | −34.04°C, −29.27°F, 239.11 K |
| Block | p | 0.002898 |
| Atomic number | 17 | 35.45 |
| State at 20°C | Gas | 35Cl, 37Cl |
