fashionista!
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i really need help with science homework
its about the mendeleev table
http://web.fccj.org/~ethall/2045/ch5/pt1871.gif
this is the table
*
1. Compare alternative versions of the periodic table. List the advantages and disadvantages of the different versions.*
2. Compare Mendeleev’s original periodic table with the one we use. List 3 general ways similarities and 3 ways in which it is different. *
3. What 2 main features was his organisation of elements based on?
*
4. Mendeleev lists atomic weights, not atomic numbers. Why? *
5. Mendeleev left spaces in his table. Why?*
6. Later this practice of leaving spaces was vindicated. Explain. *
7. Why do no Noble gases appear in his table? *
8. When did they appear and why was the delay? *
9. Early Periodic tables may have Iodine and Tellurium reversed. Explain. *
10. Comment on the similarities of elements found in his table:
a. Grioup I b. Group II c. Group III d. Group IV
e. Group V f. Group VII d. Group VII e. Group VIII
i dont get it! I WOULD LOVE HELPP. TEN POINTS TO WHOEVER ANSWERS FIRSTT.
its about the mendeleev table
http://web.fccj.org/~ethall/2045/ch5/pt1871.gif
this is the table
*
1. Compare alternative versions of the periodic table. List the advantages and disadvantages of the different versions.*
2. Compare Mendeleev’s original periodic table with the one we use. List 3 general ways similarities and 3 ways in which it is different. *
3. What 2 main features was his organisation of elements based on?
*
4. Mendeleev lists atomic weights, not atomic numbers. Why? *
5. Mendeleev left spaces in his table. Why?*
6. Later this practice of leaving spaces was vindicated. Explain. *
7. Why do no Noble gases appear in his table? *
8. When did they appear and why was the delay? *
9. Early Periodic tables may have Iodine and Tellurium reversed. Explain. *
10. Comment on the similarities of elements found in his table:
a. Grioup I b. Group II c. Group III d. Group IV
e. Group V f. Group VII d. Group VII e. Group VIII
i dont get it! I WOULD LOVE HELPP. TEN POINTS TO WHOEVER ANSWERS FIRSTT.