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Topics 1-4

What are the 4 stages a chemical reaction has taken place? effervescence, temperature change, colour change and precipitation is formed.
What if a compound has ite/ate at the end of it, what does it mean? contains oxygen
What does a solvent do? dissolves a solute to form a solution
Name 4 ways to speed up a chemical reaction higher temps, more concentrated chemicals, increase surface area and add a catalyst
What is a catalyst? increases surface area but remains unchanged
What are the 3 parts of an atom and where are they found? protons- positive, found in nucleas neutron- neutral, found in nucleas electron- negative, found orbiting nucleas
How do you calculate the mass number? protons added to neutrons
What is the atomic number the same as? number of protons and number of electrons
What is an ion? a charged atom or molecule
How does an atom become an ion? loosing electrons (positive) gaining electrons (negative)
What is an isotope? has the same atomic number but different mass number
What is the relative atomic mass? average weight of a number of isotopes
What is a covalent bond? overlap of 2 half filled negative electron pair clouds held together by the common attraction to 2 positive nuclei!!!! OOooohhhh yeeeaaah!
Name at least of the 3 diatomic atoms Flourine, chlorine, bromine, iodine, oxygen and nitrogen
How do you find the valency? group number
Why are noble gases so unreactive? because they have a full outer orbital
How does an atom become stable? by gaining or loosing electrons to give them a full orbital.
Created by: clairegartland



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