Chemistry Review sheet: Unit 1- Lesson 1‚ 2 *Key notes to keep in mind* ü Metals have a high low ionization energy ü Non-metals have a high electron affinity · Atom: The basic unity of an element which still retains the elements properties · Atomic number: the unique number of protons in the nucleus of a particular element · Isotope: Atoms of the same element which contain a different number of neutrons · Periodic law: The chemical
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Review of Related Literature Group 2 (IV-Assumption) Background information: (Local) Based on http://www.zamboanga.com‚ Caringo ‚ Mercedes‚ Camarines Norte‚ Philippines is experiencing too many black outs‚ they also state that they don’t rely on Diesel fuel and coal for their Electricity‚ because in their place there are many renewable and sustainable source of energy like Hydro Power‚ Solar Power‚ and Wind Power. Background information: (Foreign) According to http://www.bbc.co.uk Peru is also
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are created by the complete transfer of electrons from one atom to another. In this process of electron transfer‚ each atom becomes a ion that is isoelectronic with the nearest noble gas.‚ the substance is held together by electrostatic forces between the ions. The tendency for these ions to be formed by elements is corespondent to the octet rule‚ when atoms react‚‚ they tend to do so in such a way that they attain an outer shell containing eight electrons. The factors that effect the formation of
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when we get there. Matter is composed of atoms. Atomic nuclei are tightly bound protons and neutrons (1H excepted) with electrons hanging out in the electron clouds around them. Also‚ there are chemical bonds between atoms in a lot of different kinds of matter. These bonds involve the borrowing and loaning of electrons (the so-called ionic bonds) or the sharing of electrons (the so-called covalent bonds). That’s matter‚ and now we’re going to see what happens when we shoot stuff at it. Incoming
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Germanium and silicon are two well-known semiconductors. 1.2 Atoms and elements Ordinary matter is made up of protons‚ neutrons‚ and electrons and is composed of atoms. An atom consists of a tiny nucleus made up of protons and neutrons‚ on the order of 20‚000 times smaller than the size of the atom. The outer part of the atom consists of a number of electrons
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Core Module 1: The Chemical Earth Contextual Outline The Earth includes a clearly identifiable biosphere‚ lithosphere‚ hydrosphere and atmosphere. All of these are mixtures of thousands of substances and the use of this pool of resources requires the separation of useful substances. The processes of separation will be determined by the physical and chemical properties of the substances. In order to use the Earth’s resources effectively and efficiently‚ it is necessary to understand the properties
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photon interactions throughout the radiologic field. These are produced when matter and excited electrons interact with each other at the same level. The photons are able to penetrate through matter without a big interaction due to the energy being absorbed in matter. The photons in this interaction are the x-ray and gamma photons. Their lives are ended when they give off their energy to an electron in need. This interaction along with the other interactions are very important‚ especially for the
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orbitals react and exchange or share electrons; the result is either a covalent bond (shared electrons so that each has a full shell) or an ionic bond (the electron is completely removed from one atom and given to the other; the differently charged ions then attract and bond). 1. Covalent bonding Gilbert Newton Lewis (October 23‚ 1875 – March 23‚ 1946)[2] was an American physical chemist known for the discovery of the covalent bond and his concept of electron pairs; his Lewis dot structures and
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Protons or Electrons Atomic mass equals the number of Protons + Neutrons Using the periodic table‚ fill in the chart for each Atom (Round the atomic mass to the nearest whole number). 2. Carbon (C) Atomic # = ____6__Atomic Mass = _ 12 _ # of Protons = ____6____# of Neutrons = ___6_____# of Electrons = ___6_____ # of Electrons in the valence shell? __4___ 3. Oxygen (O) Atomic # = ___8___Atomic Mass = ___16____ # of Protons = ____8____# of Neutrons = ____8____# of Electrons = ___8_____
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Lab: Flame Test Purpose: to determine the ID of 2 unknown substances Background Information: Every atom consists of a nucleus with tiny electrons whizzing around it. The further away from the nucleus they are‚ the more energy the electrons have. If a metal atom is heated‚ the electrons get enough energy to jump higher away from the nucleus‚ they become “excited”. When they fall back closer to the nucleus (back to their ground state)‚ they give off this extra energy as light. Why is the
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