Transcription of THE s-BLOCK ELEMENTS - NCERT
{{id}} {{{paragraph}}}
Example: stock market
THE s-BLOCK ELEMENTS - NCERT
299 THE s- block ELEMENTSThe s- block ELEMENTS of the Periodic Table are those inwhich the last electron enters the outermost s-orbital. Asthe s-orbital can accommodate only two electrons, twogroups (1 & 2) belong to the s- block of the Periodic 1 of the Periodic Table consists of the ELEMENTS :lithium, sodium, potassium, rubidium, caesium andfrancium. They are collectively known as the alkali are so called because they form hydroxides onreaction with water which are strongly alkaline in ELEMENTS of Group 2 include beryllium, magnesium,calcium, strontium, barium and radium. These elementswith the exception of beryllium are commonly known asthe alkaline earth metals. These are so called because theiroxides and hydroxides are alkaline in nature and thesemetal oxides are found in the earth s crust*.
and dihydrogen. 2M 2H O 2M 2OH H2 2 + →+ + + − (M = an alkali metal) It may be noted that although lithium has most negative E value (Table 10.1), its reaction with water is less vigorous than that of sodium which has the least negative E value among the alkali metals. This behaviour of lithium is attributed to its
Loading..
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: