The vitamin niacin (nicotinic acid,C6H5NO2) can be isolated from a variety of natural sources such as liver, yeast, milk, and whole grain. It also can be synthesized from commercially available materials. From a nutritional point of view, which source of nicotinic acid is best for use in a multivitamin tablet? Why?

Q: Which of the following is described as a pure substance that consists only of atoms with the same…

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Q: How many protons, neutrons, and electrons 58Ni2+ has?

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Q: Identify the element represented by each of the followingsymbols and give the number of protons and…

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Q: Which of the following elements is the smallest? Oxygen, O (#8) Carbon, C (#6) O Sulfur, S (#16)…

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Q: 1 Elements ________ exhibit similar physical and chemical properties. Group of answer choices in…

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Q: 2.89 In which one of the following pairs do the two species resemble each other most closely in…

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Q: What are the chemical symbols and atomic number of Barium Ba and Magnesium Mg

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Q: LKuipor Bek asderolch Jupiter Mércúry Venus * Uranus Saturn Mars Earth Ceres Neptune Jupiter Pluto…

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Q: 4. 14N and 1C have the same number of A. isotopes. B. protons. C. neutrons. D. electrons.

A: The subscript denotes the atomic number and the superscript denotes atomic mass.

Q: An element is a pure substance that is made up a ____ type of ato

A: An element is a pure substance that is made up an identical type of atom.

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Q: The element lithium has an atomic weight of 6.941 amu. There are only two isotopes of lithium,a6Li…

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Q: The energy released by the nuclear bomb that destroyed Hiroshima was equivalent to 12.4 kilotons of…

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A: Atom  is the smallest unit of matter which has the properties of a chemical element. It can not be…

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Q: Atoms of a specific element that have the same number of protons but a different number of neutrons…

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Q: Which of the following elements is the largest? O Aluminum, Al (#13) O Indium, In (#49) Antimony, Sb…

A: We are authorised to solve only one question at a time. Please post rest of the question separately.

Q: Elements of which of the following groups on the periodic table always occur naturally as monatomic…

A: The groups given are, A) Noble gases B) Halogens C) Chalcogens  D) Pinctogens E) Group 4 A (14)…

Q: 5. Which of the following represent isotopes of the same element? А: 34 B: 79x C: 78x 34 D: 81x 35…

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Q: 3. It is important to learn about quantum mechanics because: A. This information tells us why…

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Q: 11. At death, a nobleman in ancient Egypt was mummified and his body contained 1.4 x 10 3 g of…

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Q: 2. A naturally occurring sample of argon contains 2696 atoms of Ar, 504 atoms of Ar, and 7.968 X 10…

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Q: K! Play Kahoot!-Enter ga x O Chapter 4.1 W OLogin Greek god personality Bell Ringer 2/28/22…

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Q: Give the number of protons, electrons, and neutrons in neutral atoms of each of the following…

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Q: Consider a rectangular piece of printer paper that is 8.5’’ x 11’’ (’’ denotes inches). In order to…

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A: Most similar in their chemical properties

Q: While looking at bromine (Br) on the periodic table, a student needs to find another element with…

A: The

Q: Do both members of the following pairs have the same num-ber of protons? Neutrons? Electrons?(a) ³₁H…

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Q: Which of the highlighted elements in Figure P2.7 is (a) a reactive nonmetal, (b) a chemically inert…

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Q: Which of the following elements is the least metallic?   a. Aluminum   b. Phosphorus   c. Magnesium…

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Q: Which one of the following has as many electrons as it has neutrons? A) 19F B) 40C22+ C) 14C4- D}…

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.