define S block element
Answers
The s-block elements are the 14 elements contained within these columns.
All of the s-block elements are unified by the fact that their valence electrons (outermost electrons) are in an s orbital.
The s orbital is spherical and can be occupied by a maximum of two electrons.
Elements in column 1 have one electron in the s orbital, and elements in column 2 (plus helium) have two electrons in the s orbital.
The s-block elements include hydrogen (H), helium (He), lithium (Li), beryllium (Be), sodium (Na), magnesium (Mg), potassium (K), calcium (Ca), rubidium (Rb), strontium (Sr), cesium (Cs), barium (Ba), francium (Fr) and radium (Ra). The periodic table shows exactly where these elements are within the s-block.
HOW TO REMEMBER IT?
If the periodic table were a city, the s-block would be a small neighborhood filled with extremely similar houses and properties. Within the periodic table, the s-block is located to the far left and includes all of the elements in the first two columns (columns 1 and 2) plus helium, which is located in the top right corner in column 8A (column 18 on some versions of the periodic table)