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.
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.
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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