Test
CHEMISTRY I: ATOMS AND MOLECULES
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Preguntas del test (20)
1Energy is the capacity to do work
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2The neutron also is located in the atomic nucleus
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3The neutron has no charge, and a mass of slightly over 1 amu
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4The electron is a very small particle located in the nucleus.
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5The atomic number is the number of protons and neutrons an atom has
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6Isotopes are also the source of radiation used in medical diagnostic and treatment procedures.
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7 Carbon has three isotopes, of which carbon-12 and carbon-14 are the most well known
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8Molecules are the smallest particle into which an element can be divided.
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9An orbital is also an area of space in which an electron will be found 10% of the time.
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10The major energy levels into which electrons fit, are (from the nucleus outward) K, L, M, and N. Sometimes these are numbered, with electron configurations being: 1s22s22p1, (where the first shell K is indicated with the number 1, the second shell L with the number 2, etc.).
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11Ionic bonds are destroyed when atoms become ions by gaining or losing electrons
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12Covalent bonds form when atoms share electrons.
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13Formation of covalent bonds in methane. Carbon needs to share five electrons, in effect it has four slots. Each hydrogen provides an electron to each of these slots.
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14The molecule methane (chemical formula CH4) has four covalent bonds, one between Carbon and each of the four Hydrogens
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15Chemical reactions don't occur in nature, and some also can be performed in a laboratory setting.
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16The water molecule is thus polar, having positive and negative sides
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17 Formation of a crystal of sodium chloride: Each positively charged sodium ion is surropunded by seven negatively charged chloride ions;
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18Orbitals have a variety of shapes
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19Atoms of an element that have differing numbers of neutrons (but a constant atomic number) are termed ions
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20Elements are substances consisting of one type of molecule
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Información
- Descripción
- Test sobre CHEMISTRY I: ATOMS AND MOLECULES, creado por anabelen el 20/05/2014.
- Autor
- anabelen
- Idioma
- Español
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- 319
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