Post-transition metal

$Scatter plot of electronegativity values and melting points for metals (up to fermium, element 100) and some borderline elements (Ge, As, Sb, At). Elements categorised by some authors as post-transition metals are distinguished by their relatively high electronegativity values and relatively low melting points. High electronegativity corresponds to increasing nonmetallic character;[8] low melting temperature corresponds to weaker cohesive forces between atoms and reduced mechanical strength.[9] The geography of the plot broadly matches that of the periodic table. Starting from the bottom left, and proceeding clockwise, the alkali metals are followed by the heavier alkaline earth metals; the rare earths and actinides (Sc, Y and the lanthanides being here treated as rare earths); transition metals with intermediate electronegativity values and melting points; the refractory metals; the platinum group metals; and the coinage metals leading and forming a part of the post-transition metals. The increased electropositivity of Be and Mg and the higher melting point of Be distances these light alkaline earth metals from their heavier congeners. This separation extends to other differences in physical and chemical behaviour between the light and heavier alkaline earth metals.[n 2]$

A crystal of a silvery metal crystal lying on a grey surface

In chemistry, post-transition metals are the metallic elements in the periodic table located between the transition metals (to their left) and the metalloids (to their right). Usually included in this category are gallium, indium and thallium; tin and lead; and bismuth. Which elements are counted as post-transition metals depends, in periodic table terms, on where the transition metals are taken to end and where the metalloids or non-metals are taken to start.

单词	Poor metal
释义	Poor metal 原声例句 VOA Special 2020年3月合集 Hoover was born in the farm state of Iowa in eighteen seventy-four. His father was a poor metal worker who kept moving his family from state to state. 胡佛1874年出生在爱荷华州的农场，他的父亲是一位贫穷的金属工人，不断地带着家人从一个州搬到另一个州。英语百科 Post-transition metal $Scatter plot of electronegativity values and melting points for metals (up to fermium, element 100) and some borderline elements (Ge, As, Sb, At). Elements categorised by some authors as post-transition metals are distinguished by their relatively high electronegativity values and relatively low melting points. High electronegativity corresponds to increasing nonmetallic character;[8] low melting temperature corresponds to weaker cohesive forces between atoms and reduced mechanical strength.[9] The geography of the plot broadly matches that of the periodic table. Starting from the bottom left, and proceeding clockwise, the alkali metals are followed by the heavier alkaline earth metals; the rare earths and actinides (Sc, Y and the lanthanides being here treated as rare earths); transition metals with intermediate electronegativity values and melting points; the refractory metals; the platinum group metals; and the coinage metals leading and forming a part of the post-transition metals. The increased electropositivity of Be and Mg and the higher melting point of Be distances these light alkaline earth metals from their heavier congeners. This separation extends to other differences in physical and chemical behaviour between the light and heavier alkaline earth metals.[n 2]$ In chemistry, post-transition metals are the metallic elements in the periodic table located between the transition metals (to their left) and the metalloids (to their right). Usually included in this category are gallium, indium and thallium; tin and lead; and bismuth. Which elements are counted as post-transition metals depends, in periodic table terms, on where the transition metals are taken to end and where the metalloids or non-metals are taken to start.
随便看	musculi dorsalis的意思 musculi dorsalis externi的意思 musculi dorsalis externi laterales的意思 musculi dorsalis externi mediales的意思 musculi dorsalis interni的意思 musculi dorsalis interni laterales的意思 musculi dorsalis interni mediales的意思 musculi dorsi的意思 musculi epicranius的意思 musculi epitrochleoanconaeus的意思 musculi erector spinae的意思 musculi extensor carpi radialis brevis的意思 musculi extensor carpi radialis longus的意思 musculi extensor carpi ulnaris的意思 musculi extensor coccygis的意思 musculi extensor digiti quinti proprius的意思 musculi extensor digitorum的意思 musculi extensor digitorum brevis的意思 musculi extensor digitorum communis的意思 musculi extensor digitorum longus的意思 musculi extensor hallucis brevis的意思 musculi extensor hallucis longus的意思 musculi extensor indicis proprius的意思 musculi extensor pollicis brevis的意思 musculi extensor pollicis longus的意思

Poor metal

Post-transition metal