11. elements on the periodic table are arranged by increasing (4 points) number of neutrons reactivity mass atomic number 12. protons are located (4 points) both in orbit and in the nucleus in the nucleus with electrons in orbit around the nucleus in the nucleus with neutrons 13. which of the following is not true for atoms? (4 points) they are made of protons, neutrons, and electrons. they are the building blocks of matter. they are made up of elements. they contain a nucleus. 14. which of the following is not true for atoms? (4 points) they are the smallest particle of any element. they are able to be divided by a chemical reaction. they are the building blocks of matter. they are made of protons, neutrons, and electrons. 15. cl is highly reactive. you would expect nacl to (4 points) be highly reactive take on some of the properties of cl have similar properties to cl to have completely different properties 16. as you move from left to right across the periodic table, the atomic numbers (4 points) decrease are random stay the same increase 17. an ionic compound is formed when (4 points) a metal bonds with a nonmetal a nonmetal bonds with another nonmetal three nonmetals bond together a metal bonds with another metal

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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pre-sliced bread is a relatively recent development in baking technology. previous to that, it was always sold in a bakery in daily-made contiguous loaves with no wrapping, and was moderately perishable, usually being used with a day or two (which is why every bakery had a discounted “day-old” bread table.) therefore, pre-sliced bread would grow stale quickly. the hard crust provided a protective layer, and once the exposed dry slice left from the previous cut was removed, the interior was still soft.

what keeps bread soft is the moisture retained in the crumb (the light spongy part that’s not crust). the reason the crust develops is the surface of the dough gets exposed to hot dry air during baking which browns the outer layer and seals it, preventing all the moisture from escaping the dough. longer exposure to air will also eventually cause your bread to lose flavor and become stale.

people were used to cutting slices as they needed them and storing bread in a specially-made wooden or metal breadbox or pail with a lid to preserve it longer, but the first automatically sliced commercial loaves were produced on july 6, 1928, in chillicothe, missouri, using a machine invented by otto rohwedder, an iowa-born, missouri-based jeweler.[1] pre-sliced bread would indeed dry out, were it not for another 20th century technology: the plastic bag. bread could now be pre-sliced, and if the enclosing bag remains sealed as much as possible, the bread will remain soft and fresh for longer than if sitting unwrapped on a shelf or enclosed in a bread box that is not air-tight. sealed packaging meant bread could also be sold on store shelves and eliminate frequent trips to a bakery.

sealing bread in a plastic bag had another effect: the moisture in the loaf will re-distribute into the crust and soften it, which is sometimes more pleasing in a sandwich - especially for children whose teeth might not yet be strong enough to tear through a hard crust. a homemade loaf of bread can be sealed in a bag overnight and the crust will become soft like store-bought sandwich bread.

these were novel changes in how bread was produced and sold, which led to the coining of the phrase “the greatest thing since sliced bread.”