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25 Cards in this Set
- Front
- Back
- 3rd side (hint)
1. What is an element? |
* A substance made up of only one kind of atom |
A substance made up of only... |
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2. What is a compound? |
* 2 or more different elements chemically joined/bonded together |
2 or more... |
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3. What are the names of the 3 subatomic particles? |
* Proton |
* P |
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4. What 2 particles are located in the nucleus? |
* Protons and neutrons |
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5. Where are the electrons found? |
* In shells/energy levels around the nucleus |
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6. What charge does a proton have? |
* Positive or + |
* P for proton, P for ... |
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7. What charge does a neutron have? |
* No charge or neutral or 0 |
* Neutron ... Neut ... |
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8. What charge does an electron have? |
* Negative or - |
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9. Why are elements said to have no overall charge? |
* They have equal numbers of protons and electrons. The charges cancel out |
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10. What is the mass of each subatomic particle? |
* Proton = 1 |
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11. What is the atomic number? |
* The number of protons (bottom number) |
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12. What is the mass number? |
* The number of protons and neutrons added together (top number) |
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13. What is an isotope? |
* An atom of the same element with a different number of neutrons |
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14. How are the electrons arranged in shells around the nucleus? |
* 1st shell holds up to 2 electrons |
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15. How does the electronic configuration identify where elements are found in the periodic table? |
* The group number is the same as the number of electrons in the outer shell (e.g. all Group 1 elements have 1 electron in the outer shell) |
* All Group 1 elements have ... |
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16. Elements in the same group have similar what? |
* Chemical properties. They all behave and react in a similar way |
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17. What are the elements in Group 0 known as? |
* The nobel gasses |
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18. Why are they unreactive? |
* They have a full outer shell of electrons |
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19. Why do elements bond together to form molecules or compounds? |
* To gain a full outer shell by transfering (ionic) or sharing (covalent) electrons |
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20. What type of elements form ionic compounds? |
* Metals and non-metals |
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21. What type of elements form covalent bonds? |
* Non-metals and non-metals |
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22. How can we represent chemical reactions? |
* Balanced symbol equations and word equations |
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23. What are the reactants? |
* What is put into a chemical reaction (the stuff you start with) |
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24. What are the products? |
* What is produced in a chemical reaction (the stuff you make) |
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25. What can we say about the mass of the reactants and products? |
* It is the same before and after the reaction (mass is conserved) |
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