chief of state. n. pl. chiefs of state. The formal head of a nation, distinct from the head of the government. Also called head of state. chiefâ² of stateâ² n. the titular head of a nation, as a president or king. Thesaurus Antonyms Related Words Synonyms Legend: Switch to new thesaurus . Noun: 1.
Strength is an important quality in the use of metals. This is especially true in construction, transportation, heavy industry and tool making. Metal alloys are often stronger than a metal in their pure form. In discussing the strongest metals, we should first consider what we mean by strength.
An alloy is a mixture of two elements, one of which is a metal. Alloys often have properties that are different to the metals they contain. This makes them more useful than the pure metals alone. For example, alloys are often harder than the metal they contain. Alloys contain atoms of different sizes, which distorts the regular arrangements of atoms. This makes it more difficult for the layers to slide over each other, so alloys are harder than the pure metal.