# Atoms & Equations

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• Created by: Chloe
• Created on: 22-11-12 17:12
• Atoms & Equations
• Flame Test
• Potassium (K) = Lilac
• Sodium (Na) = Yellow
• Calcium (Ca) = Brick Red
• Copper (Cu) = Blue/Green
• Lithium (Li) = Reddish Orange
• Barium (Ba)  = Apple Green
• Atomic Structures
• Protons
• Are in the nucleus of the atom
• Neutrons
• Atomic Structures
• Protons
• Are in the nucleus of the atom
• Neutrons
• No charge (Neutral)
• Has a mass of 1
• Made from two down quarks and one up quark.
• Relative Atomic Mass = number of Protons+ number of Neutrons
• Positively Charged particle.
• Proton number= Electron number
• Made from two Up quarks and one down
• Electrons
• A charge of -1
• Mass of an electron is practically 0
• In the shells that orbit the nucleus of the atom
• Electronic configuration
• 2.8.8.1 would mean the element is in group 1 in the periodic table
• 2.8.8.5 would mean the element is in group 5
• No charge (Neutral)
• Has a mass of 1
• Made from two down quarks and one up quark.
• Relative Atomic Mass = number of Protons+ number of Neutrons
• Positively Charged particle.
• Proton number= Electron number
• Made from two Up quarks and one down
• Electrons
• A charge of -1
• Mass of an electron is practically 0
• In the shells that orbit the nucleus of the atom
• Electronic configuration
• 2.8.8.1 would mean the element is in group 1 in the periodic table
• 2.8.8.5 would mean the element is in group 5
• Balancing Equations
• Take Potassium + Water --> Potassium Hydroxide + Hydrogen, for example
• K + H2O --> KOH + H2
• Separate each side of the equation like so.
• There is 1 K, 2 H's and 1 O
• There is one more hydrogen on the one side of the equation. So a 2 must be put in front of the H2O, making 2H2O
• 2H2O But then we have two oxygens as well on the left side so a two must be put in front of the KOH making 2KOH.
• Then we have 2 potassiums on the right and only one on the left so a 2 must be put in front of the K becoming 2K.
• 2K + 2H2O ------>2KOH + H2
• There is 1 K, 3 H's and 1 O
• More Examples?
• 2Na + Cl2 --> 2NaCl
• Na + Cl2 --> NaCl
• Na + Br2 --> NaBr
• 2Na + Br2 --> 2NaBr
• Cl2+ NaBr --> NaCl+ Br
• Cl2 + 2NaBr--> 2NaCl + 2Br