Modern Periodic Table

Q.

How many electrons can fit in the orbital for which n=3, l=1?

Q.

What is the electron configuration of aluminum?

Q.

What is meant by transition elements?

Q.

How do you know the charge of an element from the periodic table?

Q. What is the IUPAC name of an element with the atomic number 119?

1. Unilunium
2. Unununium
3. Ununnilium
4. Ununennium

Q.

What is the basic difference in approach between the Mendeleev’s Periodic Law and the Modern Periodic Law?

Q.

What are typical and non-typical transition elements?

Q. The outer electron configuration of $Gd$. (Atomic number $64$):

1. $4f^{3}5d^{5}6s^2$
2. $4f^{8}5d^{0}6s^2$
3. $4f^{4}5d^{4}6s^2$
4. $4f^{7}5d^{1}6s^2$

Q.

Which one of the following processes involve chemical reactions?

1. Storing of oxygen gas under pressure in a gas cylinder

2. Liquefaction of air

3. Keeping petrol in a china dish in the open

4. Heating copper wire in presence of air at high temperature

Q. In a NaCI type crystal distance between Na^+and Cl^-ion is 2.814 A^{†extdegree\overline{}} and the density of solid is 2.167 g cm^{-^3} then find out the value of Avogadroconstant.

Q.

What is the rarest element on Earth ?

Q.

Explain the term ‘Bridge elements’.

Q.

What is the valency of potassium?

Q.

In terms of period and group where would you locate the element with Z =114?

Q. An element $X$ belongs to $3^{rd}$ period and ${17}^{th}$ group, state
(ii) Name of the element.

Q. An element A has 3 electrons in the outermost orbit and element B has 6 electrons in the outermost orbit. What will be the formula of the compound formed?

1. $A{B}_2$
2. $A_2{B}_3$
3. $A_2{B}_6$
4. $A_3{B}_2$

Q.

Define electrovalency.

Q. What is the IUPAC name of an element with the atomic number 101?

1. Unnilunium
2. Ununnunium
3. Ununnilium
4. Ununennium

Q. What would be the IUPAC name and the symbol for an element having atomic number 120?

1. Unbioctium; Ubo
2. Ununbium; Uub
3. Unbinilium; Ubn
4. Unniloctium; Uno

Q. $M^{3+}$ ion has its electronic configuration as $\left[Ar\right]3d^{10}4s^2$. The element lies in:

1. $s$-block
2. $p$-block
3. $d$-block
4. $f$-block

Q.

Which of the following statements related to the modern periodic table is incorrect?
(a) The p-block has 6 columns, because a maximum of 6 electrons can occupy all the orbitals in a p-shell.
(b) The d-block has 8 columns, because a maximum of 8 electrons can occupy all the orbitals in a d-subshell.
(c) Each block contains a number of columns equal to the number of electrons that can occupy that subshell.
(d) The block indicates value of azimuthal quantum number (l ) for the last subshell that received electrons in building up the electronic configuration.

Q.

What is the basic theme of organisation in the periodic table?

Q.

Why cannot oxidation occur without reduction?

Q.

What are examples of metals, non-metals and metalloids?

Q.

Which element do you think would have been named by
(i) Lawrence Berkeley Laboratory

(ii) Seaborg’s group?

Q. The number of chloride ion(s) produced by complex tetraamminedichloroplatinum(IV) chloride in an aqueous solution is

1. Four
2. Two
3. Three
4. One

Q.

How to solve:

Number of moles of Carbon Atoms?

Q.

1 mole of all gases at STP conditions occupy a volume of 22.4 L.

1. True
2. False

Q.

An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is:

1. 11

2. 17

3. 18

4. 20

Q.

AX is a covalent diatomic molecule where A and X are second-row elements of the periodic table. Based on Molecular orbital theory, the bond order of AX is $2.5$. The total number of electrons in AX is __________. (Round off to the Nearest Integer).