IONIC COMPOUNDS In chemistry‚ an ionic compound is a chemical compound in which ions are held together in a lattice structure by ionic bonds. Usually‚ the positively charged portion consists of metal cations and the negatively charged portion is an anion or polyatomic ion. Ions in ionic compounds are held together by the electrostatic forcesbetween oppositely charged bodies. Ionic compounds have high melting and boiling points‚ and they are hard and very brittle. Ions can be single atoms‚ as the sodium and chlorine in
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that has a specific chemical composition. 6. What is a compound? New substance that results from the bonding of two or more elements. 7. What is the difference between covalent and ionic bonds? Ionic Bonds are the bonding of two electrically charged atoms when one atom has transferred an electron to the other causing the two ions to become positively and negatively charged. Covalent
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Chemical Bonding Lab Chemical compounds are combinations of atoms held together by chemical bonds. These chemical bonds are of two basic types—ionic and covalent. Ionic bonds result when one or more electrons from one atom or group of atoms is transferred to another atom. Positive and negative ions are created through the transfer. In covalent compounds no electrons are transferred; instead electrons are shared by the bonded atoms. The physical properties of a substance‚ such as melting point
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Part I: Bonding A) Group # and Valence Electrons -is used to describe the column in which an element is in. i.e.‚ Lithium is in group 1. *Group number tells you how many valence electrons a specific element has. i.e.‚ Aluminum has 3 valence electrons. B) Ionic Bonding -Ionic bonds form F.U.’s (formula units) -A bond between a metal and a non metal -Occurs when an atom has lost or gained an electron **BRING YOUR ION SHEET FOR NAMING** C) Covalent Bonding -Covalent bonds form molecules
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LA PURISIMA CONCEPCION ACADEMY (Formerly Mataasnakahoy High School ) Committed to Faithful Service; Inspired by Love FOURTH QUARTER LEARNING PLAN 4.1 Understanding by Design (UBD) Plan in Science and Technology III ( Chemistry ) ____________________________________________________________________________ Topic: Chemical Accounting Subject Area: Chemistry Big Ideas: The Chemical Reactions Year Level: Third Year Allocated
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contiguous stretches of polypeptides that are capable of folding and functioning independently of the rest of the protein. T 4. In an alpha helix‚ approximately ¼ of the amino acids are engaged in intrachain hydrogen bonding. F 5. Alpha helices are stabilized by hydrogen bonding whereas beta sheets are stabilized by hydrophobic interactions. F 6. In a beta sheet the side chains of adjacent amino acids face in opposite directions. T 7. In an alpha helix‚ the side chains of the amino acids are
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ATOM Atoms are the basic building blocks of ordinary matter. Atoms can join together to form molecules‚ which in turn form most of the objects around you. Atoms are composed of particles called protons‚ electrons and neutrons. Protons carry a positive electrical charge‚ electrons carry a negative electrical charge and neutrons carry no electrical charge at all. The protons and neutrons cluster together in the central part of the atom‚ called the nucleus‚ and the electrons ’orbit’ the nucleus. A
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Self-assessment practice tests Test 1 – Material from Chapters 2–4 | 45 minutes 1 The kinetic theory suggests different arrangements for the atoms or molecules in the three states of matter. The diagrams below show how evidence suggests the particles are arranged in the three states of matter. 1 2 3 What are the three states shown? 1 A B C D 2 gas liquid solid liquid 2 liquid gas liquid solid 3 solid solid gas gas The graph shows the heating curve for a metal that is solid at room temperature (25
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Atom Bonding Lab Introduction: Atoms bond in covalent bonds and ionic bonds. A covalent bond is when atoms share electrons in order to gain stability with each other (Larsen). To have stability which each other‚ the atoms share electrons so that their outer electron shell is equal. Ionic bonding is the complete transfer of valence electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions (Larsen‚ 2010). Element that have a positive ion are able to bond
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HKDSE Chemistry – A Modern View 1 (SAMPLE) Suggested Answers (Coursebook) |Chapter 1 The fundamentals of chemistry | |Class Practice |1 | |Chapter Exercises |3 | |Chapter 2 The atmosphere
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