Unit 2 Power Point
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1. Matter is composed of protons, neutrons, and electrons. Protons define the element, while neutrons define the isotope. 2. An element is the most basic form of matter and is defined by its number of protons. Elements usually have an equal number of protons and electrons. 3. Isotopes are variations of the same element that have a different number of neutrons, which affects mass but not chemical properties.
Unit 2 Power Point
- 1. Unit 2Mr. TaylorClassifying Matter
- 2. What is Matter Made Of?Protons: + charge, 1 AMU, in nucleusNeutrons: neutral charge, 1 AMU, in nucleusElectrons: - charge, 1/1000th AMU, electron cloudThe number of protons decides the element number.The number of electrons decides the ionic/oxidation state.The number of neutrons decides the isotope
- 3. ElementsAn element is the most basic form of matter.It is defined by the number of protons.Usually, the number protons and the number of electrons are equal.
- 4. Atomic Number is the number of ProtonsAtomic Mass is Protons and Neutrons together
- 5. ElementsAn element is the most basic form of matter.It is defined by the number of protons.Usually, the number protons and the number of electrons are equal.Secret Question #1:Which element is this?
- 6. IsotopesIsotopes are variations on elements, where the number of neutrons is different.Since neutrons are neutral in charge, they do not affect the properties of the element, only the weight.This isotope is Lithium-7It has 3 protons and 4 neutrons. If it only had 3 neutrons, it would be Lithium-6
- 7. Atomic Number is the number of ProtonsAtomic Mass is Protons and Neutrons together
- 8. Most Elements Do NOT Occur in the Pure Form
- 10. MoleculeA molecule consists of two or more atoms.They can be the same element (N2)Or different elements. CO – carbon monoxide C2H4 – ethyleneC6H12O6 - glucose
- 11. Proteins are HUGE Molecules
- 12. CompoundsCompounds contain two or more elements.
- 13. Compoundswater (dihydrogenoxide) salt (sodium chloride) ammonia (NH4) rust (iron oxide) chalk (calcium carbonate) sugar (glucose)
- 14. ElementsElements have only ______ type of atomElements are defined by the number of ______.The whole universe is made from about _____ different elements.The most common element in the universe is __________.*If you are watching by recording, send me these sentences with the answers*
- 15. CompoundsMost elements do ____ exist on their ownThey join with other ___________ to form ____________ .Compounds may have __________ different types of elements in them.*If you are watching by recording, send me these sentences with the answers*
- 16. Mixtures Homogeneous or Heterogeneous?If it is distributed equally it is homogenous. If it separates into layers, it is heterogeneousColloids are suspended mixtures that do not separate. Milk is an example.Otherwise, over time the layers will separate, such as mud in a lake.
- 17. SolutionA solution involves a reaction between molecules due to electromagnetic charges. Solutions are by definition transparent.
- 18. PrecipitateA precipitate are solids that form during a chemical reaction between two solutions.
- 19. MixturesIron and Sulfur powder in a the mixtureSo, it is hypothesis time:How can we separate the iron from the sulfur?Enter some ideas in the chat box.
- 20. MixturesIron and sulphur – the mixtureHow can we separate the iron from the sulphur?Use a magnet!Iron is magnetic, sulfur is not...
- 21. Turning an iron-sulphur mixture into a CompoundHeatFe + S FeSCompounds form as a result of chemical reactions
- 22. When iron and sulfur react+sulfur(S) atoms iron (Fe) atoms
- 23. When iron and sulfur react+sulfur(S) atoms iron (Fe) atomsiron sulfide(FeS) molecules
- 24. Differences between compounds and mixturesMIXTURESCOMPOUNDSMixtures can be separated easilyCompounds can not be separated
- 25. Differences between compounds and mixturesMIXTURESCOMPOUNDSMixtures can be separated easilyMixture have the properties of the substances present in itCompounds can not be separatedCompounds do not have the properties of the elements
- 26. Differences between compounds and mixturesMIXTURESCOMPOUNDSMixtures can be separated easilyMixture have the properties of the substances present in itNo chemical change takes place when a mixture is madeCompounds can not be separatedCompounds do not have the properties of the elementsA compound is always formed due to a chemical reaction
- 27. Differences between compounds and mixturesMIXTURESCOMPOUNDSMixtures can be separated easilyMixture have the properties of the substances present in itNo chemical change takes place when a mixture is madeThere is no heat taken in or given out when a mixture is madeCompounds can not be separatedCompounds do not have the properties of the elementsA compound is always formed due to a chemical reactionHeat is either taken in or given out when a compound is made
- 28. Differences between compounds and mixturesMIXTURESCOMPOUNDSMixtures can be separated easilyMixture have the properties of the substances present in itNo chemical change takes place when a mixture is madeThere is no heat taken in or given out when a mixture is madeA mixture can contain elements in any proportionCompounds can not be separatedCompounds do not have the properties of the elementsA compound is always formed due to a chemical reactionHeat is either taken in or given out when a compound is madeA compound always contains the elements in fixed proportions, e.g. FeS contains 7g of iron to 4g of sulphur