Groups

Q. The increasing order of electronegativity among the following elements is:

1. boron < nitogen < carbon < oxygen < fluorine
2. boron < carbon < oxygen < nitogen < fluorine
3. boron < carbon < nitogen < oxygen < fluorine
4. fluorine < oxygen < nitogen < carbon < boron

Q. What are the two criteria used in the development of modern periodic table.

Q. In which block of the modern periodic table are the nonmetals found?

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

Q. Which of the following is an alkaline earth metal?

1. ${}_{11}$Na
2. ${}_{12}$Mg
3. ${}_{19}$K
4. ${}_{13}$Al

Q.

Name the following metals.

(i) A metal present in cryolite other than sodium.

(ii) A metal which is unaffected by dilute or concentrated acids.

(iii) A metal present in period 3, group 1 of the periodic table.

Q.

Predict the Group of an element X if its atomic number is 16.

1. V A

2. V B

3. VI A

4. VI B

Q.

Name the following

A metal present in period $3$, group $1$ of the periodic table.

Q. What is closed shell electronic configuration?

Q. In the modern periodic table, the periods are represented by:

1. columns
2. individual elements
3. diagonal rows
4. horizontal rows

Q. In modern periodic table, if two elements have the same number of valence electrons, then they belong to the same :

1. group
2. none of the above
3. period
4. part

Q. Statement 1: Iron is a transition element.​
Statement 2: Iron lies in group 8 of the modern periodic table.​

Q. 5. How many metalloids are present in the periodic table and what are their names??

Q.

Give reason for neon gas does not combine with other elements to form a compound.

Q.

All the elements in a group have?

1. Same mass number

2. Same number of shells

3. Same number of valance electrons

4. None of these

Q. The elements of one period are given below in order from left to right $Li,Be,B,C,O,F,Ne$
Which one of the above elements belongs to the halogen series?

1. $Li$
2. $O$
3. $F$
4. $Ne$

Q. The element which has maximum metallic character among following is :

1. Li
2. Mg
3. K
4. Na

Q. Ex. Q7. Balance the following equation stepwise.

$c.\mathrm{Ag}\left(s\right)+\mathrm{HCl}\left(\mathrm{aq}\right)\to \mathrm{AgCl}\downarrow +H_2\uparrow d.\mathrm{NaOH}\left(\mathrm{aq}\right)+H_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\to {\mathrm{Na}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)+H_{2}O\left(l\right)$

Q. The period of element with atomic number 20 in the periodic table is :

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

Q. groups and periods are there in the modern periodic table.

1. 18
2. 7
3. 8
4. 20

Q.

What is the general electronic configuration of the outer shell of the elements from actinoid series?

Q. Why group number 1-7 were divided into 2 subgroups in Mendeleevs periodic table

Q. Zinc does not show the variable valency as elements of d-block, because:

1. this is soft metal
2. d-orbital is full
3. its melting point is low
4. volatile Metal

Q.

There is an element X with atomic number 16. A student was assigned a task to write down the features of the group to which this element belongs to. Help him find the group number of the element X so that he can complete his task.

1. Group fourteen

2. Group sixteen

3. Group fifteen

4. Group thirteen

Q. In the module of chapter-Metals and Non Metals, you have explained the case of lithium metal, at the atomic level, that why it is so reactive (because there are 3 protons attracting the Valence electron, and 2 electrons in the k-shell repelling the valence electron, thats why the net resultant force is less) So can you please explain me the case of Sodium and calcium that why less energy is required to kick out valence electrons, like you have explained in the case of litium i.e at the Atomic level

Q. Listed below are the electronic configuration of five elements. Arrange the elements in the increasing order of metallic character:

1. (d) < (b) < (a) < (c) < (e)
2. (d) < (a) < (b) < (e) < (c)
3. (d) < (a) < (b) < (c) < (e)
4. None of these

Q. 94.HOW TO FIND GROUP NUMBER OF AN ELEMENT WHOSE LAST ELECTRON LIE IN THE d ORBITAL.WRITE THE FORMULA TO EXPLAIN.

Q.

If an atom has electronic configuration $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^2$ it will be placed in?

1. Second group

2. Third group

3. Fifth group

4. Sixth group

Q. Why group number 1-7 were divided into 2 subgroups in Mendeleevs periodic table

Q.

The following element is a member of _____ group of the periodic table.

1. 

2. 

3. 

4. 

Q.

The noble gases that constitute group 18 of the modern periodic table are also known as which of the following?

1. Avert Gases

2. Inert Gases

3. Covert Gases

4. Overt Gases