Atomic Spectrum is a series of lines of color produced when light from an excited atom is passed through a prism. It is also known as a line spectrum. Each element has its own unique atomic spectrum. Because of their unique nature‚ atomic spectra are also referred to as the "fingerprints of the elements." The series of lines of color that an atom will produce is related to the locations of the electrons on that atom and their relationship with the nucleus. Atomic spectra were fundamental pieces
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simulation‚ you will investigate how atoms’ electronegativity value affects the bonds they produce. When two atoms bond‚ a pair of electrons is shared between atoms. Electronegativity is a measure of a single atom’s ability to hoard electrons shared in that bond. In this lab you will work diligently‚ at your own pace‚ to answer a number of questions. To begin‚ from what you’ve already learned about the protons and electrons in an atom‚ what would cause an atom to have a high electronegativity value
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is because his work had information on protons‚ neutrons‚ and electrons‚ the main components that make up the atom‚ showed what the atom looks like when the three are put together‚ and had also been the discoverer of the nucleus which is the one of them most important parts of the atom’s structure. The discovery of the particles that
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Current‚ Voltage and Power * Electricity is the flow of electric charge. We can describe the flow of electric charge in several ways. These include the quantities Current‚ Voltage and Power. Current * Current (I) is the rate of flow of Charge Carriers‚ such as electrons. Current is usually thought of as moving in the direction of positive charge‚ so from the positive power supply to the negative. However‚ since in metals it is electrons that carry electric charge‚ the actually flow is opposite
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9.1 Orbitals and Theories of Chemical Bonding 1. Which one of the statements concerning valence bond (VB) and molecular orbital (MO) bond theories is correct? a) MO theory predicts that electrons are localized between pairs of atoms. b) In VB theory‚ bonding electrons are delocalized over the molecule. c) MO theory accurately describes bonding in O2 and NO‚ VB theory does not. d) VB theory can describe molecular bonding in excited states. e) MO theory is used to accurately predict
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Chapter 7 same number of valence electrons=behave similarly(chemical properties) ▪ neon gases (neon‚ argon) unreactive in chemical reactions(stable) ▪ Gilbert Lewis-octet rule(atoms tend to achieve electron configuration of gas) ▪ atoms of metallic atoms lose electrons‚ atoms of nonmetal atoms lose or share electrons with another nonmetal elements to achieve a complete octet ▪ to achieve octet‚ change electrons to ge ns2 np6 configuration ▪ remove electrons=ionization ▪ metals in group
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Gizmo Warm-up Just like students sharing markers‚ atoms sometimes share or swap electrons. By doing this‚ atoms form bonds. The Ionic Bonds Gizmo™ allows you to explore how ionic bonds form. To begin‚ check that Sodium (Na) and Chlorine (Cl) are selected from the menus at right. Click Play ([pic]) to see electrons orbiting the nucleus of each atom. (Note: These atom models are simplified and not meant to be realistic.) 1. Each atom consists of a central nucleus and several shells that contain
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decades‚ and centuries go by we get a better understanding of the atom and what it looks like. The Atomic Model has changed drastically based on the understanding we have on it‚ each new model has added more information to what we know about it‚ making it easier for scientists and the world to understand. The Atomic Model is a very important part of Science and Chemistry‚ it helps explain the structure and what is inside the atom‚ the particle that all things‚ people‚ and places are made up of. The
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terms below‚ you are prepared for an exam. You need to spend time with your lecture notes‚ and prepare your own review questions in addition to the ones provided here. WHITE 301 General Themes and Topics Atoms‚ Elements and Molecules (Chapter 2) Describe the general structure of an atom and define atomic number‚ atomic mass‚ valence electrons‚ and isotopes. Atomic number – the # of protons in the nucleus Atomic mass – the number of protons and neutrons Valence electrons – the number of electrons
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COE CHEMONE Reviewer for CHEMONE Finals Rules for Counting Significant Figures 1. Nonzero integers. Nonzero integers always count as significant figures. 2. Zeros. There are three classes of zeros: a. Leading zeros are zeros that precede all the nonzero digits. These do not count as significant figures. In the number 0.0025‚ the three zeros simply indicate the position of the decimal point. This number has only two significant figures. Note that the number 1.00 _ 102 above is written in exponential
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