Question

Date: 2. Using the completed table above, in the following table, list in the appropriate columns the symbol and atomic number of the elements that have the following patterns of electrons in the outermost energy level of the atom: A: the END of the configuration is "s(ending in Is' or 2s or3sı , ctc.) B: ends in"f"; C: ends in "p' "; D: ends in "рг "; E: ends in "p""; F: ends in "p4 "; di: ends in "ps-, and H: ends in"pe". C ID Ends with | s mple 3. List all the elements with the atomic numbers that end with electrons in the 3d orbitals, but have NO 4p electrons below. Example: Sc DISCUSSION QUESTIONS 1. How does your table completed in step 2 compare with the periodic table? Which element does not appear to be in the correct place in your data sheet compared to the periodic table? Explain why it is in a different place on the periodic table. 2. Compare the table completed in step 3 with the periodic table. Explain what part of the periodic table is similar to this table. What are these elements called in this table?

Answer 1

2.

	A	B	C	D	E	F	G	H
Ends with	s1	s2	p1	p2	p3	p4	p5	p6
	1 H	2 He	5 B	6 C	7 N	8 O	9 F	10 Ne
	3 Li	4 Be	13 Al	14 Si	15 P	16 S	17 Cl	18 Ar
	11 Na	12 Mg	31 Ga	32 Ge	33 As	34 Se	35 Br	36 Kr
	19 K	20 Ca	49 In	50 Sn	51 Sb	52 Te	53 I	54 Xe

3.

21 Sc

22 Ti

23 V

24 Cr

25 Mn

26 Fe

27 Co

28 Ni

29 Cu

30 Zn

DISCUSSION QUESTIONS

1.Atoms with same pattern of outermost electrons are placed in same group as they have same properties.But element He does not appears at correct position as in periodic table it is above p⁶ column. It is at different place because its properties resembles noble gas configuration and because of symmetry and its chemical properties it is placed above p⁶ column

2. Central part is similar to this table inbetween the s-block and p-block elements. these elements are known as transition elements.