18-09-10 random notes for chem

18-09-10 random notes for chem - -Atomic number or the...

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Chapter 1 - Natural laws are concise, often in mathematical form about natural phoneoma. o Example Copernicus about the earth travelling around the sun - Scientific method is combination of observe. Expir. And the formulation of laws, hypotheses and theories. - Weight is acceleration due to gravity- - Kgm 2 s -2 = 1 Joule Chapter 2 - Two types of radioactive charges o Alpha which carry two fundamental un its of positive charge and have the same mass as helium atoms o Beta which are negatively charged particles produced by changes occurring within the nuclei of radioactive atoms and have the same properties of electrons. o Also Gamma rays – not made up of particles, ratio electromagnetic radiation of extremely high penetrating power.
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Unformatted text preview: -Atomic number or the proton number is called z-The number of protons and neutrons in an element is mass number a.-The neutron number is calculated by using A-Z o Naming Chemical Elements A Z E • Example with element : 197 79 AU • 2 non metals = molecular compound • A metal + a non-metal = ionic compound For molecular mass you just get the unit mass given and multiply by that by the amount of moles so for water it would be 16 + 1.01 x 2 Avogadro’s constant= 6.02 x 10 23 HOBRFNCL P 4 S 8 Mono, di , tri, tetra, penta, hexa, hepta, octa, nona, deca In limiting reaction use one with less amount of moles...
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This note was uploaded on 10/22/2010 for the course PHYSICS 1D03 taught by Professor N. mckay during the Spring '08 term at McMaster University.

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18-09-10 random notes for chem - -Atomic number or the...

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