How many elements are there
[DOC File]Counting Atoms Worksheet - JPSAOS
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1) write down the different elements in each compound. 2) write down how many of that particular atom there are. 3) how many atoms are there total in the compound. Examples: 1) NaOH Na - 1. O - 1 3 total. H - 1 . 2) MgCl2 Mg – 1. Cl – 2 3 total. 10) 5 ZnSO4 Zn – 5. S – 5 30 total. O – 20
[DOC File]Naturally Occurring Elements in the Human Body
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Naturally Occurring Elements in the Human Body SYMBOL ELEMENT ATOMIC NUMBER (SEE P. 28) PERCENTAGE OF HUMAN BODY WEIGHT O Oxygen 8 65.0 C Carbon 6 18.5 H Hydrogen 1 9.5 N Nitrogen 7 3.5 Ca Calcium 20 1.5 P Phosphorous 15 1.0 K Potassium 19 0.4 S Sulfur 16 0.3 Na Sodium 11 0.2 Cl Chlorine 17 0.2 Mg Magnesium 12 0.1 Trace elements (less than 0.01%): boron (B), …
[DOC File]Counting Atoms Worksheet
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Sep 06, 2012 · 1) write down the names of different elements in each compound. 2) write down how many of that particular atom there are. 3) how many atoms are there total in the compound. Examples: NaOH Na/Sodium - 1. O/Oxygen - 1 3 total. H/ Hydrogen - 1 -----
[DOC File]Electron configuration Activity
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How many elements are there in the third period of the periodic table? ____ Wait a second…that seems strange! What element(s) did you write the configuration for that ended with an electron configuration of 3d? _____ What row or period is it in? _____ Something is unusual about the 4s and 3d orbitals. ...
[DOC File]'Elements In Living things'
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There are no conventional colors for phosphorus and calcium, so pick any color you like. Then color as you read, coloring in sequence the boxes representing the majority elements in living things (H, O, C, N, P, Ca), the atoms rising and falling out of the boxes and forming compounds below the boxes, the water (A), and the food (B).
[DOC File]Chapter 1 Chemistry: Matter and Measurement
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B. Elements. 1. An element is _____. a. How many elements are there? b. How is an element identified? C. Compounds. 1. A compound is a _____. a. What elements does water contain? b. What elements are contained in methane, acetylene and naphthalene?
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