What are d Block Elements ?

What are d Block Elements ? 
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1 Answer

Answer :

Ans: Those elements in which d-orbital are progressively filled up are known as d-orbital.
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Related questions

Why do transition metals have higher I.E than s –block elements ?

Description : Why do transition metals have higher I.E than s –block elements ?

Last Answer : Ans: It is due to smaller atomic size than s-block elements , effective nuclear charge is more , terefore I.E is high.

Application of d- & f- block elements

Description : Application of d- & f- block elements

Last Answer : Application of d- & f- block elements:- 1. Iron and steel used in construction,as catalyst in Haber's process 2. CrO2 is used in magnetic tapes 3. Ni is in hydrogenation 4. W ( ... in contact process 9. Titanium is in nuclear reactions. 10. PdCl2 is in Wacker's process.

Why are Ti+2 and other transition metals and their ions paramagnetic ?

Description : Why are Ti+2 and other transition metals and their ions paramagnetic ?

Last Answer :  Ans: These ions have unpaired electrons in d- subshell. 

Why is K2Cr2O7 generally preferred over Na2Cr2O7 in a volumetric analysis .Give reason .

Description : Why is K2Cr2O7 generally preferred over Na2Cr2O7 in a volumetric analysis .Give reason .

Last Answer : Ans : It is because Na2Cr2O7 is hygroscopic in nature that is why it absorbs moisture from atmosphere , therefore its standard solution can not be prepared .

Explain the following , giving reason . (a) Transition metal and many of their compounds show paramagnetic behavior (b) The enthalpy of atomisation of the transition metal is high . (c) The Transition metal generally form coloured compounds .

Description : Explain the following , giving reason . (a) Transition metal and many of their compounds show paramagnetic behavior (b) The enthalpy of atomisation of the transition metal is high . (c) The Transition metal generally form coloured compounds . 

Last Answer : Ans(a) It is due to unpaired electrons . (b) It is due to strong metallic bond and additional Covalent bonds due to presence of unpaired electron in d- orbitals (c) It is due to presence of unpaired electrons ,they undergo d-d transition . 

Why are lanthanoid colored and paramagnetic L

Description : Why are lanthanoid colored and paramagnetic L

Last Answer : Ans It is due to presence of unpaired electrons, they are paramagnetic and they absorb light From visible region and undergoes f-f transition and radiate complementary colour . 

Why Mn+2 is more stable than Mn+3 but Fe +3 is more stable than Fe+2 ?

Description : Why Mn+2 is more stable than Mn+3 but Fe +3 is more stable than Fe+2 ?

Last Answer : Ans Mn+2 has half filled d- orbital ,therefore it is more stable than Mn+3 Fe+3 has half filled d- orbital, therefore it is more stable than Fe +2 . 

Why are transition metal fluorides are ionic in nature where as chlorides and bromides are covalent in nature .

Description : Why are transition metal fluorides are ionic in nature where as chlorides and bromides are covalent in nature . 

Last Answer : Ans - It is because of fluorine is most electronegative where as Cl and Br are less electro negative . Greater the difference in electro negativity more will be ionic character .

Why is Cu+1 diamagnetic and Cu +2 paramagnetic ?

Description : Why is Cu+1 diamagnetic and Cu +2 paramagnetic ?

Last Answer : It is because Cu+ does not have unpaired electrons where as Cu+2 has unpaired electrons in d-sub cell . 

Why do Zr and Hf show similar properties ?

Description : Why do Zr and Hf show similar properties ?

Last Answer :  Ans It is due to similar ionic size which due to lanthanide contraction . 

Why are Cr+ , Ag+ & Sc+3 Colour less ?

Description : Why are Cr+ , Ag+ & Sc+3 Colour less ? 

Last Answer : Ans It is because they do not have unpaired electrons ,therefore can not under goes d-d transition .

Why are transition metals and there compounds generally coloured ?

Description : Why are transition metals and there compounds generally coloured ?

Last Answer : Ans It is due to present of unpaired electrons in transition metals and their ions , that is why they absorbed light from visible region and undergoes d-d transition and radiate complementary colour . 

Why does V2O5 acts as catalyst ?

Description : Why does V2O5 acts as catalyst ?

Last Answer : Ans : It is because V shows variable O.S . 

What is an lanthanoid contraction ? What is its cause ? Give its consequences .

Description : What is an lanthanoid contraction ? What is its cause ? Give its consequences .

Last Answer : Ans The decrease in atomic and ionic size with increase in atomic no. in lanthanoid series is called lanthanoid contraction . The cause of lanthanoid contraction is poor shielding effect of d and f ... is close resemblance between elements of 4 d and 5 d transition series . due to similar ionic 

Why Ce+3 Can be easily Oxidised to Ce+4 ?

Description : Why Ce+3 Can be easily Oxidised to Ce+4 ?

Last Answer : Ans : It is because Ce+4 has stable electronic configuration . 

Why do transition metals have high enthalpy of atomization ?

Description : Why do transition metals have high enthalpy of atomization ?

Last Answer :  Ans : it is due to strong metallic bonds and additional covalent bonds 

What is the highest oxidation state shown by Cr. (24) , Mn(25) ?

Description : What is the highest oxidation state shown by Cr. (24) , Mn(25) ?

Last Answer : Ans: Cr. Shows (+6) and Mn Shows (+7) Oxidation state .  

Why are Zn , Cd , Hg are not regarded as transition metals ?

Description : Why are Zn , Cd , Hg are not regarded as transition metals ? 

Last Answer : Ans: It is because neither they nor their ions have incompletely filled d- orbitals . 

The binary compound of Hydrogen with S block elements are called as ------------------

Description : The binary compound of Hydrogen with S block elements are called as ------------------

Last Answer : Ans: ionic hydride

Give 3 features of p- block Elements.

Description : Give 3 features of p- block Elements.

Last Answer : Ans: (i) some of them are non metals especially those heading all the groups. ( ii) Moving down the group metallic character increases (iii) Many of them are highly electronegative and form covalent compound

How many elements are found in 4Th period in d- block?

Description : How many elements are found in 4Th period in d- block?

Last Answer : Ans: 10 elements

In p block elements which group is known as halogens and chalcogens?

Description : In p block elements which group is known as halogens and chalcogens?

Last Answer : Ans: 17 =halogen 16=chalcogens

Which elements of s- block are largely found in biological fluids & what is its importance?

Description : Which elements of s- block are largely found in biological fluids & what is its importance?

Last Answer : Mono valent sodium and potassium ions and divalent magnesium and calcium ions are found in large proportions in biological fluids. These ions perform important biological functions such as maintenance of ion balance and nerve impulse conduction.

What are s- block elements?

Description : What are s- block elements? 

Last Answer : s-block elements are those in which the last electron enters the outermost s-orbital. As the s-orbital can accommodate only two electrons, two groups (1 & 2) belong to the s-block of the Periodic Table. 

The block of elements in the periodic table which are filling the 4-f electron shell are known as:

Description : The block of elements in the periodic table which are filling the 4-f electron shell are known as:

Last Answer : ANSWER: LANTHANIDES

Find out the s - block elements compounds importance/uses.

Description : Find out the s - block elements compounds importance/uses.

Last Answer : Find out the s - block elements compounds importance/uses.

What are the valence electrons? For s-block and p-block elements show that number of valence electrons is equal to its group number.

Description : What are the valence electrons? For s-block and p-block elements show that number of valence electrons is equal to its group number.

Last Answer : What are the valence electrons? For s-block and p-block elements show that number of valence electrons is equal to its group number.

Which of the atomic number represent the s-block elements ?

Description : Which of the atomic number represent the s-block elements ?

Last Answer : Which of the atomic number represent the s-block elements? a. 7, 15 b. 3, 12 c. 6, 14 d. 9, 17

What are d block elements?

Description : What are d block elements?

Last Answer : The d-block contain elements from group 3 to 12.

What are the properties of 'f ' block elements?

Description : What are the properties of 'f ' block elements?

Last Answer : they are of two types lanthanides and actinides

What are the properties of 'f ' block elements?

Description : What are the properties of 'f ' block elements?

Last Answer : they are of two types lanthanides and actinides

The tendency for complex formation is maximum in (a) s-block elements (b) p-block elements (c) noble gases (d) d-block elements

Description : The tendency for complex formation is maximum in (a) s-block elements (b) p-block elements (c) noble gases (d) d-block elements

Last Answer : Ans:(d)

f-block elements are also called (a) Alkali metals (b) Inner transition elements (c) Transition elements (d) Transuranic elements

Description : f-block elements are also called (a) Alkali metals (b) Inner transition elements (c) Transition elements (d) Transuranic elements

Last Answer : Ans:(b)

Which of the following circuit elements is used to 'block' DC in an electronic circuit? (1) Resistances (2) Capacitance (3) Inductance (4) Diode

Description : Which of the following circuit elements is used to 'block' DC in an electronic circuit? (1) Resistances (2) Capacitance (3) Inductance (4) Diode

Last Answer : (2) Capacitance Explanation: A capacitor (originally known as condenser) is a passive two-terminal electrical component used to store energy in an electric field. Capacitors are widely used ... electric power transmission systems for stabilizing voltage and power flow, and for many other purposes.

In addition to testing the calibration of a circuit breaker, maintenance should include all of the following EXCEPT ______________. A. changing out of magnetic elements and thermal heaters yearly B. checking for corrosion, accumulation of dirt and thermal fatigue C. inspecting for loose or missing parts D. making sure foreign matter does not block tripping element

Description : In addition to testing the calibration of a circuit breaker, maintenance should include all of the following EXCEPT ______________. A. changing out of magnetic elements and thermal heaters yearly B. ... for loose or missing parts D. making sure foreign matter does not block tripping element

Last Answer : Answer: A

The elements of the s-block and pblock are together referred to as?

Description : The elements of the s-block and pblock are together referred to as?

Last Answer : Representative elements

Find the block to which the following elements belong.

Description : Find the block to which the following elements belong.

Last Answer : a) Aluminium (Atomic number: 13) 2 2 6 2 Electronic configuration of aluminium is 1s , 2s 2p ,3s 3p 1 The orbital occupied by the ultimate electron is p'. So aluminium belongs to p' block. ... , 2 6s The orbital occupied by the penultimate shell is f'. So Cerium belongs to f' block.

Why ‘f block’ elements are called inner transition elements?

Description : Why ‘f block’ elements are called inner transition elements?

Last Answer : The elements for which f sub shells are filling are called the inner transition elements.

Why are‘d block’ elements called outer transition elements?

Description : Why are‘d block’ elements called outer transition elements?

Last Answer : ‘d block’ elements are called outer transition elements because they contain at most two electrons in their outer shell.

Which of the following circuit elements is used to ‘block’ DC in an electronic circuit ? (1) Resistances (2) Capacitance (3) Inductance (4) Diode

Description : Which of the following circuit elements is used to ‘block’ DC in an electronic circuit ? (1) Resistances (2) Capacitance (3) Inductance (4) Diode

Last Answer : Capacitance

Explain the Mechatronics system with the help of block diagram and labeled the various elements.

Description : Explain the Mechatronics system with the help of block diagram and labeled the various elements. 

Last Answer : The key elements of Mechatronics systems can be classified under following categories:  Information systems  Mechanical systems  Electrical systems  Computer systems  Sensor and actuators  ... is adjusted based on generated error and again signal is given to actuators and sensors.