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| Chemical change vs. Physical change |
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Chemical
- New substance is created.
- It is not easily reversed.
Physical
- No new substance is created.
- Still made up of the same atoms.
- It is easily reversed. |
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| What do the numbers 1 to 108 mean? |
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| The numbers represent the atomic number of the element. The atomic number is the number of protons in that particular atom. |
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| Give an example of a group and explain what they have in common. |
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Definition
| An example of a group is group 2, the alkaline earth metals. They all have the same amount of valence electrons. For this example, group 2 has a positive charge of positive 2 therefore it loses 2 electrons to have a full outer shell. |
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What is a period and give an example of one.
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| Periods are the rows on the periodic table. Elements in the same row have the same orbital number. An example of a period is period 3 which is the third row on the periodic table. |
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| How do you tell non metal and metal apart on the periodic table? |
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| You draw a line above Aliminum and Silicon and then draw a stair case down.The non metals are on the right of the staircase and the metals are on the left. |
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| What are physical properties? |
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Definition
Luster - can be made into jewellry
Ductile - can be drawn out into wire
Malleable - can be made a different shape
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Electrons = Protons
Protons = Atomic number
Neutrons = mass number - atomic number |
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| SO little 4 below little 2- above |
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| Word equation for Zinc and Calcium |
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Zinc + Oxygen = Zinc Oxide
Calcium + Oxygen = Calcium Oxide |
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| You can do it. Focus and don't freak out. |
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