Periodicity

Q. Consider the section of the periodic table given below:

Group number	IA	IIA	IIIA	IVA	VA	VIA	VIIA	0
	1	2	13	14	15	16	17	18
	Li		D			O	J	Ne
	A	Mg	E	Si		H	K
	B	C		F	G			L

Note: In this table B does not represent boron
C does not represent carbon
F does not represent fluorine
H does not represent hydrogen
K does not represent potassium
You must see the position of the element in the periodic table.
Some elements are given in their own symbol and position in the periodic table, while others are shown with a letter. With reference to the table answer the following:
(i) Which is the most electronegative?
(ii) How many valence electrons are present in G?
(iii) Write the formula of the compound between B and H.
(iv) In the compound between F and J, what type of bond will be formed?
(v) Draw the electron dot structure for the compound formed between C and K.

Q.

List some of the defects in the modern periodic table.

Q. give the IUPAC name and symbol of the element for atomic number 10

Q.

Occurence of characteristic properties of element at regular intervals in a periodic table is considered as periodicity in properties of elements.

1. True

2. False

Q.

The non-metals are present:

1. On the right hand side of the periodic table.

2. On the left hand side of the periodic table.

3. In the middle of the periodic table.

4. In the centre of the periodic table.

Q.

Which of these do not reflect the periodicity of the elements?

1. Bonding behaviour

2. Electronegativity

3. Ionization energy

4. Neutron/proton ratio

Q. 32. Why electron affinity is only defined for neutral isolated gaseous atom and not for others

Q.

In the bond between alkali metals and chalcogens, which of the following electronic activity will take place?

1. Transfer of electrons

2. Electron pair donating

3. Electron pair recieving

4. Electron pair sharing

Q.

What are the horizontal rows in the periodic table called?

Q. Why dont all groups contain metals and non-metals?

Q.

Out of the first 20 elements in the modern periodic table which are metals?

Q. The electron affinity values for the halogens follows the order:

1. F < Cl > Br > I

2. F < Cl < Br < I

3. F > Cl > Br > I
4. F < Cl > Br < I

Q. difference between electron affinity and electron gain enthalp

Q. Find the number of amphoteric oxide(s) from the following
$NiO,A{l}_2{O}_3,B_2{O}_3,Pb{O}_2,ZnO,MgO$.

Q. The atomic number$\left(z\right)$ of an element is 24. In its ground state how many electrons are present in the ${}^{\prime }{N}^{\prime }$ shell?

1. 4
2. 2
3. 1
4. 3

Q. Which one of the following is a basic oxide:
$\left(1\right)N_2{O}_5$

Q. What is periodic table.Show the periodic table also

Q. How noble gases posses London forces explain it in simple form?

Q. The variation in periodic properties in transition elements is not as prominent as in representative elements.
State whether the given statement is true or false.

1. True
2. False

Q. An element in period 3 whose electron affinity is zero is:

1. Sulphur
2. Sodium
3. Chlorine
4. Argon

Q.

Why are chemical properties of elements belonging to a particular group , similiar ?

Q. Which of the following ions is NOT isoelectronic to a noble gas?

1. $A{l}^{3+}$
2. $K^{+}$
3. $C{o}^{2+}$
4. $B{r}^{-}$

Q. A transition element x has a configuration Ar3d4 in its +3 oxidation state its atomic number is