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My report on "Atomic Structure"
My report on "Atomic Structure"
Student name: Lauren DeHanas
Teacher name: Dr_R_Belton
School: Northern Michigan University
Submission Time: 8/27/13 7:39 PM
Page 1 : http://mw2.concord.org/public/part2/atomstrk/page1.cml
1. Now imagine that some random person walks up and throws one dart at the board. Based on the pattern of holes you've seen from previous players, where will this dart most likely land: hint
(a) There is no way to tell.
(b) Close to the center of the board.
(c) Out toward the edge of the board.
My answer is (b) (6:59:01 PM)
2. Explain the reasoning behind your prediction:
It will hit close to the center of the board because the players are trying to hit the center of the board to score more points. (7:00:14 PM)
Page 2 : http://mw2.concord.org/public/part2/atomstrk/page2.cml
1. Explain why the color of the orbital gets lighter as you move further from the nucleus: (see completed orbital above and to the right)
The color of the orbital gets lighter as you move further from the nucleus because electrons circling are found closest to the nucleus when orbiting. Therefor it will be the darkest there and lighter away from the nucleus since the electrons are less likely to be found further away from the nuclues. (7:04:42 PM)
2. If you had to bet on where you are most likely to find an electron at any particular point in time, where would it be?
(a) Near the nucleus.
(b) Away from the nucleus.
(c) There is a perfectly even chance of finding an electron anywhere.
My answer is (a) (7:01:15 PM)
Page 3 : http://mw2.concord.org/public/part2/atomstrk/page3.cml
1. Which sub-atomic particle defines the kind of element an atom will be? hint
(a) electron
(b) proton
(c) neutron
My answer is (b) (7:05:23 PM)
2. Which number defines the kind of element an atom will be?
(a) mass number
(b) atomic number
(c) a combination of both mass and atomic number
My answer is (b) (7:05:32 PM)
3. Explain how you can predict the atomic number and the mass number by using an atom's number of protons and/or neutrons.
You can predict the atomic number because the atomic number is always equal to the number of protons in an atom. You can predict the mass number because it is always the number of protons plus the number of neutrons. (7:06:52 PM)
4. Put a snapshot of your lithium atom here.
Lithium Atom (7:07:54 PM)
Page 4 : http://mw2.concord.org/public/part2/atomstrk/page4.cml
1. What would be the charge on an atom with 7 protons and 4 electrons?
+3 (7:08:19 PM)
2. What would be the charge on an atom with 7 protons and 8 electrons?
-1 (7:08:36 PM)
3. An atom is NOT an ion when:
(a) there are no electrons
(b) there are an equal number of protons and electrons
(c) the number of protons and neutrons cancel out
(d) the atom has no overall charge
(e) both B and D
My answer is (e) (7:08:36 PM)
4. Explain how can you predict the overall charge by knowing an atom's number of protons and electrons.
You can predict the overall charge when you know an atom's number of protons and electrons because protons are always positive and electrons are always negative. They will always cancel eachother out. So say you have 5 protons and 5 electrons. Your charge will be 0 (or neutral) since you have 5 positive and 5 negative charges on that atom. (7:10:23 PM)
Page 5 : http://mw2.concord.org/public/part2/atomstrk/page5.cml
1. What is different and what is the same between these carbon isotopes? (check all that apply)
(a) the mass number is the same
(b) the atomic number is the same
(c) the mass number is different
(d) the atomic number is different
(e) the number of protons is the same
(f) the number of protons is different
(g) the number of neutrons is the same
(h) the number of neutrons is different
My answer is (b) (c) (e) (h) (7:11:00 PM)
2. Scientists use the fact that living things have a lot of carbon in them. When they die the radioactive isotope breaks down over time, turning into other elements. By seeing how much of the radioactive carbon is left you can tell how old something is. Which one of these isotopes of carbon is radioactive, and can be used for carbon dating?
(a) carbon-12
(b) carbon-13
(c) carbon-14
My answer is (c) (7:11:19 PM)
3. Try making several stable and radioactive forms of other elements. What is the general rule for creating an atom with a stable nucleus (one that is NOT radioactive)?
The general rule for creating an atom with a stable nucleus is as you change the number of protons, you must change the number of neutrons as well. You can change the number of neutrons which creates a larger mass number and a different isotope but generally you want to keep the protons and the neutrons at the same amount. (7:15:42 PM)
Page 6 : http://mw2.concord.org/public/part2/atomstrk/page6.cml
1. Click on the energy diagram to determine which orbital this is, and record the name of the orbital below:
3d Orbital (7:17:20 PM)
2. Electron orbitals (choose all that are correct):
(a) get bigger at higher energies
(b) get smaller at higher energies
(c) stay about the same size regardless of energy
My answer is (a) (7:16:33 PM)
Page 7 : http://mw2.concord.org/public/part2/atomstrk/page7.cml
1. In what order do electrons form boron’s orbitals?
(a) from lowest energy to highest
(b) from highest energy to lowest
(c) they randomly form various orbitals
My answer is (a) (7:17:33 PM)
2. Which orbital is the one that would give the best estimate of the size of this atom?
(a) 1s
(b) 2s
(c) 2p
My answer is (b) (7:18:57 PM)
3. Take a snapshot of the boron atom showing all the overlapping orbitals.
(7:19:08 PM)
Page 8 : http://mw2.concord.org/public/part2/atomstrk/page8.cml
1. What happens to the size of an atom as you go across the table from left to right. Pick a row (also called a period) and click on each atom, starting from the left.
(a) the atoms get bigger
(b) the atoms get smaller
(c) the atoms stay the same size
(d) the size changes randomly
My answer is (b) (7:19:45 PM)
2. What happens to the size of an atom as you go down a column. Pick a column (also called a group) and click on each atom, starting from the top.
(a) the atoms get bigger
(b) the atoms get smaller
(c) the atoms stay the same size
(d) the size changes randomly
My answer is (a) (7:19:57 PM)
Page 9 : http://mw2.concord.org/public/part2/atomstrk/page9.cml
In this image I have labeled each of the particles and where they are located within an atom. I labeled the protons, neutrons, and electrons and stated what charge they are as well as where they are located.
1. What is an orbital? Describe in detail.
An orbital is a path that an electron takes as it goes around an atom. There are several different types of orbitals: s, p, d, and f. S orbitals tend to just make a circular path. P orbitals make a figure eight pattern. D orbitals tend to make a four-leaf clover pattern. (7:29:34 PM)
2. What would be the charge of an ion with 10 protons and 12 electrons?
(a) it would be neutral
(b) +2
(c) -2
(d) 22
(e) 10
My answer is (c) (7:29:34 PM)
3. What is true when comparing these two isotopes? (check all that apply)
(a) they have the same number of protons
(b) they have the same number of neutrons
(c) both are have a -4 charge
(d) they are different elements
(e) they are both likely to be radioactive
My answer is (b) (d) (7:33:40 PM)
4. To the right you see part of a periodic table that shows the sizes of the atoms. Describe why it makes sense to start a new row with Li, and then another with Na:
It makes sense to start one row with Li because it is a smaller atom than Na and as you go right across the row, the atom sizes decrease. When you go down the column to Na the sizes of the atom increase but going across the row the atom sizes decrease. Also the atomic numbers increase by one (since you are adding an extra proton) so the atomic numbers are going up by one. (7:39:27 PM)
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