What, strongly associated with Switzerland, did the ancient Romans know how to do? Detailed answer

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What, strongly associated with Switzerland, did the ancient Romans know how to do? Detailed answer

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What, strongly associated with Switzerland, did the ancient Romans know how to do?

The Swiss army knife, which appeared at the end of the 19th century, has a much earlier prototype. In one of the Cambridge museums, a universal folding tool comes from ancient Rome. It includes a spoon, fork, blade, spatula, toothpick and even a special spike for picking out meat from snail shells.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

What are elements?

All matter is made up of elements. Elements are substances made up of atoms of only one kind. Many elements have similarities with each other, sometimes even very significant, but among them no two are absolutely identical. For example, hydrogen and helium are both colorless, odorless, and tasteless gases. However, hydrogen is lighter than helium. It burns in the presence of oxygen, but helium does not.

Elements differ from each other by atomic weight. Some of them under normal conditions are solids, others are liquids, and still others are gases. When heated or cooled, many of them (almost all) can go from one state to another. Some elements dissolve in water, others do not. These and many other characteristics of elements are called their physical properties. Elements can interact with each other (with a few exceptions), forming various substances. Such interactions are called chemical reactions. The ability of an element to enter into a particular reaction is determined by its chemical properties.

In accordance with their physical and chemical properties, all elements are divided into several groups. They include elements with similar properties. These groups together make up the periodic table of elements of D. I. Mendeleev. It is named after the Russian chemist Dmitri Ivanovich Mendeleev, who came up with the idea of creating this table.

The order of arrangement of elements in the table of D. I. Mendeleev is determined by their serial atomic number. The serial number of an element depends on the number of protons - positively charged particles - in the nucleus of an atom of a given element. The hydrogen atom contains only one proton and therefore occupies the first place in the periodic table. Some elements were named after great scientists, such as einsteinium (Einstein). Others are in honor of countries or certain areas on the globe: germanium (Germany), ruthenium (Russia), california (California), scandium (Scandinavia). Still others are named for their special properties: indium (because of its bright indigo blue color). Many elements are well known to everyone: copper, iron, lead, silver, gold, aluminum, sulfur, mercury, iodine and many others.

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