Assignment On Periodic Table.pdf 103u4i

Periodic table 1

What is the symbol as per IUPAC system for an element with z = 113 ?

2

What is the general configuration of inner transition element ?

3

Write the atomic number of the element present in thethird period and 15 group

4

Write the statement of mendeleev s law

5

Write the electronic configuration and find the number of unpaired electron in

6

28

Ni+2

Which of the following pairs of elements would have a more negative electron gain enthalpy and why ?

(i) O or S

(ii) Cl or O

7

How would you justify the presence of 50 elements in the 8th period of the Periodic Table?

8

The first ionization enthalpy (∆iH) values of the second period elements, P , Si and Cl are respectively

1200, 800 and 1600 kJ mol–1. Predict whether the first ∆iH value for S will be more close to 1020 or 1460 kJmol–1 ? Justify your answer. 9

what do you mean by d-block element ? and write two important characterstics of them

10

What is the group , period and block for the iron with atomic no =26

11

(i)what do you mean by the term covalent radii of atom for an element given ? (ii) write those factor which affect atomic radii (iii)Arrange following in increasing order of size (A)

12

Be, B ,Be2+, B3 +,

What do you mean by ionisation enthalpy of an element

Arrange the atoms with the following electronic configurations in order of increasing order of ionisation enthalpy i) 1s2,2s1, (ii) 1s2,2s2,2p4 13

iii) 1s2,2s2,2p3

(iv) 1s2,2s2,2p6,3s2,3p6

what will be formula of compound formed by formed element x and y given X 1s2,2s2,2p6,3s2,3p1 and Y 1s2,2s2,2p6,3s2,3p5

14

Would you expect the second electron gain enthalpy of S as positive, more negative or less negative than the first? Justify your answer.

16

what is the correct increasing order of ionization enthalpy

Ne, P , S, Cl and Ar

17

Considering the atomic number and position in the periodic table, arrange the following elements in the increasing order of metallic character : Si, Be, Mg, Na, P

18

what is the group, period and block for the gold with atomic no =79

19

The first (IE1) and second (IE2) ionization energies (KJ mol–1) of a few elements designated by Roman

numerals are shown below.

IE1

IE2

I

2372

5251

+ 40

II

420

5300

-45

III

600

2300

-60

IV

1680

3890

-350

e gain enthalpy

Which of the above elements is likely to be a)

reactive metal

b)

a reactive non – metal

c)

a noble gas

d) a metal that forms a stable binary halide of the formula. AX2(X = halogen) (e) element which belong 1nd group (f) element with smallest size if they belong to same period