Group 2A - 2 ( aq ) + H 2 ( g ) The tendency of the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Group 2A: The Alkaline Earth Metals 2A 4 Be 12 Mg 20 Ca 38 Sr 56 Ba 88 Ra Compared with the alkali metals, the alkaline earth metals are typically: harder more dense melt at a higher temperature The first ionization values (I 1 ) of the alkaline earth metals are not as low as the alkali metals: the alkaline earth metals are therefore less reactive than the alkali metals (Be and Mg are the least reactive of the alkaline earth metals) Calcium, and elements below it, react readily with water at room temperature: Ca( s ) + 2H 2 O( l ) -> Ca(OH)
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 2 ( aq ) + H 2 ( g ) The tendency of the alkaline earths to lose their two valence electrons is demonstrated in the reactivity of Mg towards chlorine gas and oxygen: Mg( s ) + Cl 2 ( g ) -> MgCl 2 ( s ) 2Mg( s ) + O 2 ( g ) -> 2MgO( s ) The 2+ ions of the alkaline earth metals have a noble gas like electron configuration and are thus form colorless or white compounds (unless the anion is itself colored). Flame colors: Calcium: brick red Strontium: crimson red Barium: green...
View Full Document

This note was uploaded on 11/22/2011 for the course CHEMISTRY CHM1025 taught by Professor Laurachoudry during the Fall '10 term at Broward College.

Ask a homework question - tutors are online