Despite the lack of specificity, the term remains in use in the literature of chemistry.

The six commonly recognised metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium.

Sporadically recognised elements show that the metalloid net is sometimes cast very widely; although they do not appear in the list of metalloid lists, isolated references to their designation as metalloids can be found in the literature (as cited in this article).

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The additional pull on outer electrons as nuclear charge increases generally outweighs the screening effect of having more electrons.

With some irregularities, atoms therefore become smaller, ionization energy increases, and there is a gradual change in character, across a period, from strongly metallic, to weakly metallic, to weakly nonmetallic, to strongly nonmetallic elements.

Splurging on $100 of clothes each month will set you back 0.5 metric tons of carbon dioxide per year You live in California, but you've got to spend Christmas at Grandma's back in Boston.

That's about a 5,000-mile round trip, making your carbon footprint from this airplane trip alone 2.23 tons of CO2.

There were about 16 million divorced households in 2000, which comes to 4,562.5 extra kilowatt-hours of electricity per household.

Break that down into carbon emissions and you get an extra 2.8 metric tons per year per household.

Its more recent meaning, as a category of elements with intermediate or hybrid properties, became widespread in 1940–1960.

Metalloids are sometimes called semimetals, a practice that has been discouraged, A metalloid is an element with properties in between, or that are a mixture of, those of metals and nonmetals, and which is therefore hard to classify as either a metal or a nonmetal.

A related effect can be seen in other diagonal similarities between some elements and their lower right neighbours, specifically lithium-magnesium, beryllium-aluminium, and boron-silicon.