* What does that mean? * Theory: Explanation * Atomic: Of atoms * How did we develop this theory? * Began with the Greeks * Democritus- 470-380 B.C. * Matter cannot be broken down indefinitely. At some point you end up with a piece that cannot be divided. That smallest piece he called an atom, from the Greek word atomos, which means “indivisible” * All matter is composed of atoms, which are bits of matter too small to be seen. These atoms
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center core of the atom. There are two parts of a nucleus and they consist of protons and neutrons. Protons contain a positive charge and neutrons contain no charge at all. Atoms of the same element have the same number of protons. The remainder of the atom is made up of an electron field. Electrons are negatively charged particles and they whirl around the nucleus at a great speed. The number of electrons and protons are equal. 2) Describe metallic bonding. Metallic atoms have only a few
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definition defines acids as substances which increase the concentration of hydrogen ions (H+), or more accurately, hydronium ions (H3O+), when dissolved in water. The Brønsted-Lowry definition is an expansion: an acid is a substance which can act as a proton donor. By this definition, any compound which can easily be deprotonated can be considered an acid. Examples include alcohols and amines which contain O-H or N-H fragments. A Lewis acid is a substance that can accept a pair of electrons to form a covalent
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• List the organ systems of the human body and their major components. 1.) Integumentary system: skin and nails. 2.) Skeletal system- bones 3.) Muscular system- tendons/muscles 4.) Lymphatic system- thymus and the spleen. 5.) Nervous system- brain and spinal cord 6.) Cardiovascular system- heart and blood vessels 7.) Endocrine system- pituitary gland, hypothalamus 8.) Digestive system- stomach and liver. 9.) Reproductive system- Penis and ovaries 10.) Urinary
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Tevlin October 5, 2015 6. Briefly describe the structure and size of an atom. How big is the nucleus in comparison to the entire atom? Atoms are extremely small; millions of atoms could fit end to end across a period at the end of a sentence. Protons and neutrons are found in the tiny nucleus at the center of the atom. The rest of the atom’s volume is made up of electrons, which surround the nucleus. The nucleus is very small compared to the atom as a whole, but it contains a majority of the atom’s
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1Q~ Identify and describe the three parts of an element responsible for identifying it. QA~ Electons, Neutrons, and Protons. 2Q~ Identify two things the atomic number tells us. QA~ Electrons and Protons. 1Q~ Identify two things the atomic number tells us. QA~ Electons and Protons. 2Q~ Explain how matter, elements, and atoms are related. QA~ Matter creates atoms and atoms create elements. 1Q~ Explain how matter, elements, and atoms are related. QA~ Matter creates atoms and atoms create
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Grantham University 2 Color Changes 1. What three particles make up every atom? Protons, neutrons, and electrons are the three main subatomic particles found in an atom. Protons have a positive (+) charge. Neutrons have a zero charge and electrons have -1 charge. The neutron and proton make up the nucleus, the center of the atom and the electron surround the nucleus. Protons are positively charged; reside in the center of the atom called the nucleus. Electrons are negatively
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1. An oxygen atom has eight protons. (a) Sketch in the arrangement of electrons around the nucleus of the oxygen atom in the following diagram. (b) How many more electrons will it take to fill the outermost energy level? 2. What is the following type of decomposition reaction called? A–B–C–D + H2O → A–B–C–H + HO–D 3. The subatomic particle with the least mass (a) carries a negative charge, (b) carries a positive charge, (c) plays no part in the atom’s chemical reactions, (d) is found only
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because of its atomic structure. The periodic table consists of one hundred eighteen elements in total. Neon is one of those elements within the Periodic table and NE symbolizes this element. Neon has an atomic number of 10 which is the number of protons in the nucleus and an atomic weight of approximately 20 which is the average mass of the atom. The interesting fact is that Neon gets its name from the Greek word “Neos” which means new. The element Neon was discovered by a Scottish chemist named
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Atoms are building blocks, all matter is composed of indivisible particles called atoms. All atoms consist of subatomic particles called; protons, neutrons and electrons. Atoms cannot be created or destroyed but can be rearranged to from different substances. Compounds and elements are composed of tiny particles known as molecules, molecules are specified as atoms that are affiliated (combined) by chemical bonds—the joining of two or more atoms. Compounds are molecules containing at least two or
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