Answers to periodic table worksheet
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Answers to periodic table worksheet

[From: ] [author: ] [Date: 12-04-09] [Hit: ]
thanks.-Heres a periodic table for you to reference.http://www.ptable.comThe atomic # = # of protons. Mass # = number on the bottom of the box.......
http://staff.fcps.net/jswango/unit3/periodicity/Periodic%20Table%20Worksheet.pdf

does anyone have the answers to that? or the link to an answer key? thanks.

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Here's a periodic table for you to reference. http://www.ptable.com
The atomic # = # of protons. Mass # = number on the bottom of the box. Neutrons are irrelevant to identification. Valence electrons vary by group, and group is the vertical columns - there are 10 groups 1-8, the transition metals and the actinide series under the main table. The horizontal columns are called periods.

Let's look at the answers you need:
1) You're trying to ID element #9. That's easy - go to the element with 9 in the upper left corner. It's Fluorine. Check this out -- http://education.jlab.org/qa/pen_number.…

1- What's atomic #? # of protons. How many protons do you have? It's right in the question.
2- Where do you find mass? Bottom of the box. It's not only the atomic mass unit weight per molecule, but the gram per mole weight as well.
3- # valence electrons? Easy -- what group is it in? Group 7 - therefore it has 7 electrons and a charge of -1, because it NEEDS ONE to complete it's octet (in other words, it's one electron short of 8)
4- What family? it's in the 2nd row - which group is that?
5- Valence configuration = electron configuration - 1s2 2s2 2p5. I has 5 different shells - 1s, 2s, and 2p, which is broken down into px, py, and pz. According to Hunds rule, you have 2 in px, 2 in py and 1 in pz.
6- What specific group are the group 7 elements? It's an easy 1 word answer. Starts with H, ends with 'gen'. (Halogen)
7- Name the element -- Fluorine.
8- What's Fluorine's symbol? Look at the periodic table. First letter.

2) Go to group 6 on the periodic table. There are only 2 elements in that group we normally concern ourselves with, B and Al. Which one is a commonly used metal? If you said aluminum, Al, you'd be correct.
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