When The number of bonding pairs in a molecule is equal to the number of electrons?

When The number of bonding pairs in a molecule is equal to the number of electrons?
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How many bonding and non-bonding electron pairs are found in the BF3 molecule? A 1 bonding and 3 non-bonding B 2 bonding and 2 non-bonding C 3 bonding and 1 non-bonding D 3 bonding and 0 non-bonding E 4 bonding and 0 non-bonding

Description : How many bonding and non-bonding electron pairs are found in the BF3 molecule? A 1 bonding and 3 non-bonding B 2 bonding and 2 non-bonding C 3 bonding and 1 non-bonding D 3 bonding and 0 non-bonding E 4 bonding and 0 non-bonding

Last Answer : D 3 bonding and 0 non-bonding  

The number of lone pairs of electrons on xenon atom in `XeF_(4)` molecule is

Description : The number of lone pairs of electrons on xenon atom in `XeF_(4)` molecule is

Last Answer : The number of lone pairs of electrons on xenon atom in `XeF_(4)` molecule is A. 4 B. 3 C. 2 D. zero

In molecule of calcium sulfide calcium has two valence electron bonds and a sulfur atom has six valence electrons. How many lone pairs of electrons are present in the Lewis structure of calcium?

Description : In molecule of calcium sulfide calcium has two valence electron bonds and a sulfur atom has six valence electrons. How many lone pairs of electrons are present in the Lewis structure of calcium?

Last Answer : What is the answer ?

Where are the two lone pairs of electrons of the oxygen atom in an alcohol molecule located? (a) in two p orbitals (b) in two sp orbitals (c) in two sp2 orbitals (d) in two sp3 orbitals

Description : Where are the two lone pairs of electrons of the oxygen atom in an alcohol molecule located? (a) in two p orbitals (b) in two sp orbitals (c) in two sp2 orbitals (d) in two sp3 orbitals

Last Answer : in two sp3 orbitals

Explain why the water molecule has a bent shape and a bond angle less than 109.5°The electron repulsion between the two lone pairs of electrons on the oxygen of water causes the O–H bonds to squeeze close together

Description : Explain why the water molecule has a bent shape and a bond angle less than 109.5° The electron repulsion between the two lone pairs of electrons on the oxygen of water causes the O–H bonds to squeeze close together

Last Answer : The electron repulsion between the two lone pairs of electrons on the oxygen of water causes the O–H bonds to squeeze close together

(3) the number of electrons orbiting around the nucleus Explanation: The chemical behavior of an atom is determined by the number of electrons on its outer shell. As for the chemical bonding properties of the atom, the electron configuration determines how it will bond, with what it will bond, and in what ratio atoms will bond to form the 20,000,000 different substances on Earth.

Description : (3) the number of electrons orbiting around the nucleus Explanation: The chemical behavior of an atom is determined by the number of electrons on its outer shell. As for the chemical bonding properties of ... , and in what ratio atoms will bond to form the 20,000,000 different substances on Earth.

Last Answer : Methyl phenyl ether can be obtained by reacting - (1) phenolate ions and methyl iodide (2) methoxide ions and bromobenzene (3) methanol and phenol (4) bromobenzene and methyl bromide

What is the amount of bonding angle in ammonia molecule ?

Description : What is the amount of bonding angle in ammonia molecule ?

Last Answer : See this link with details http://bn.m.wikipedia.org/wiki/Amonia

The covalent bonding of atoms forms a/an a. Molecule. b. Ion. c. Element. d. Isomer.

Description : The covalent bonding of atoms forms a/an a. Molecule. b. Ion. c. Element. d. Isomer.

Last Answer : a. Molecule.

In 3rd generation dentin bonding agents, HEMA (Hydroxyethylmethacrylate) is 1. a hydrophilic monomer that wets the dentinal surface 2. a hydrophilic resin that forms a ”hybrid” layer by chemically reacting the intertubular dentin. 3. a hydrophilic monomer that alters collagen to promote cross linking of collagen to dentin. 4. a bifunctional molecule resin that copolymerizes to bis-GMA resins. a. 1,2 b. 1,4 c. 2,3 d. 1,3 e. 3,4

Description : In 3rd generation dentin bonding agents, HEMA (Hydroxyethylmethacrylate) is 1. a hydrophilic monomer that wets the dentinal surface 2. a hydrophilic resin that forms a hybrid layer by chemically reacting the intertubular dentin. 3. a hydrophilic ... a. 1,2 b. 1,4 c. 2,3 d. 1,3 e. 3,4

Last Answer : b. 1,4

For which molecule can the bonding be described in terms of sp3 hybrid orbitals of the central atom? w) CH4 x) SF6 y) BF3 z) PCL5

Description : For which molecule can the bonding be described in terms of sp3 hybrid orbitals of the central atom? w) CH4 x) SF6 y) BF3 z) PCL5

Last Answer : ANSWER: B -- CH4

Name the type of bonding in water molecule and explain its formation.

Description : Name the type of bonding in water molecule and explain its formation.  

Last Answer : Type of bonding : Single co-valent bonding.  Formation of Water Molecule:  Water molecule (H2O) contains two atoms of hydrogen & one atom of oxygen. Each hydrogen atom is in short ... atom. Thus, two separate single co-valent bonds are formed between hydrogen & oxygen atoms. 

Explain the formation of water molecule and name the type of bonding.

Description : Explain the formation of water molecule and name the type of bonding. 

Last Answer : Formation of Water Molecule:   H ( Z = 1 ) 1S1 (1)   O ( Z = 8 ) 1S2 , 2S2 , 2P4 (2, 6)  Water molecule (H2O) contains two atoms of hydrogen & one atom of oxygen. ... single co-valent bonds are formed between hydrogen & oxygen atoms.  Type of bonding: Single co-valent bonding. 

What happens to the electrons in metallic bonding?

Description : What happens to the electrons in metallic bonding?

Last Answer : An element tries to get the stable electronic configuration of the nearest noble gas. If a metal has 1 or 2 or 3 valent electrons, they donate these valent electrons to the non-metals which are ... 3 electrons. So the extra electron in metals get transferred to the outermost shell of the non metal.

What happens to the electrons in metallic bonding?

Description : What happens to the electrons in metallic bonding?

Last Answer : An element tries to get the stable electronic configuration of the nearest noble gas. If a metal has 1 or 2 or 3 valent electrons, they donate these valent electrons to the non-metals which are ... 3 electrons. So the extra electron in metals get transferred to the outermost shell of the non metal.

For _______ bonding, one or more electrons are transferred between atoms. a. hydrogen b. ionic c. peptide d. covalent

Description : For _______ bonding, one or more electrons are transferred between atoms. a. hydrogen b. ionic c. peptide d. covalent

Last Answer : b. ionic

Pick out the wrong statement. (A) Copper is the metal having the highest electronic conductivity (B) Hardenability & Weldability of metals are inversely related (C) Covalent bonding formed by sharing of electrons is present in all semiconductor materials (D) Glass transition temperature applies to 'polymers' but not to 'glasses'

Description : Pick out the wrong statement. (A) Copper is the metal having the highest electronic conductivity (B) Hardenability & Weldability of metals are inversely related (C) Covalent bonding formed by ... all semiconductor materials (D) Glass transition temperature applies to 'polymers' but not to 'glasses'

Last Answer : Option A

C and Si both have same lattice structure, having 4 bonding electrons in each. However, C is insulator where as Si is intrinsic semiconductor. This is because (1) The four bonding electrons in the case of C lie in the third orbit, whereas for Si they lie in the fourth orbit (2) In case of C the valance band is not completely filled at absolute zero temperature (3) In case of C the conduction band is partly filled even at absolute zero temperature (4) The four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si they lie in the third

Description : C and Si both have same lattice structure, having 4 bonding electrons in each. However, C is insulator where as Si is intrinsic semiconductor. This is because (1) The four bonding electrons in the case of C ... the case of C lie in the second orbit, whereas in the case of Si they lie in the third

Last Answer : (4) The four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si they lie in the third

The number of lone pairs of electrons present in central atom of `CIF_3` is:

Description : The number of lone pairs of electrons present in central atom of `CIF_3` is:

Last Answer : The number of lone pairs of electrons present in central atom of `CIF_3` is:

The number of lone pairs of electrons present on Xe in `XeF_(2)` ?

Description : The number of lone pairs of electrons present on Xe in `XeF_(2)` ?

Last Answer : The number of lone pairs of electrons present on Xe in `XeF_(2)` ? A. 3 B. 4 C. 2 D. 1

In `OF_2`, the number of bond pairs and lone pairs of electrons are respectively,

Description : In `OF_2`, the number of bond pairs and lone pairs of electrons are respectively,

Last Answer : In `OF_2`, the number of bond pairs and lone pairs of electrons are respectively, A. 2,6 B. 2,8 C. 2,10 D. 2,9

What shape would a molecule with two bounds groups and two lone pairs have?

Description : What shape would a molecule with two bounds groups and two lone pairs have?

Last Answer : The correct answer is: Bent.

What shape would a molecule with two bounds groups and two lone pairs have?

Description : What shape would a molecule with two bounds groups and two lone pairs have?

Last Answer : The correct answer is: Bent.

In tRNA molecule, the anticodon arm possesses (A) 5 Base pairs (B) 7 Base pairs (C) 8 Base pairs (D) 10 Base pairs

Description : In tRNA molecule, the anticodon arm possesses (A) 5 Base pairs (B) 7 Base pairs (C) 8 Base pairs (D) 10 Base pairs

Last Answer : Answer : A

The acceptor arm in the tRNA molecule has (A) 5 Base pairs (B) 7 Base pairs (C) 10 Base pairs (D) 20 Base pairs

Description : The acceptor arm in the tRNA molecule has (A) 5 Base pairs (B) 7 Base pairs (C) 10 Base pairs (D) 20 Base pairs

Last Answer : Answer : B

In the reaction of oxalate with permanganate in acidic medium, the number of electrons involved in producing one molecule of `CO_(2)` is

Description : In the reaction of oxalate with permanganate in acidic medium, the number of electrons involved in producing one molecule of `CO_(2)` is

Last Answer : In the reaction of oxalate with permanganate in acidic medium, the number of electrons involved in producing one molecule of ... A. 5 B. 1 C. 2 D. 10

Use the information and data given below to answer the questions • Stronger intermolecular forces result in higher boiling point • Strength of London forces increases with the number of electrons in the molecule • Boiling point of HF ,HCl, HBr and HI are 293K,189K,206K and 238K respectively (a) Which type of intermolecular forces are present in the molecules HCl, HBr and HI? (b) Looking at the trend of boiling points of HCl, HBr and HI, explain, out of dipole interaction and London interaction, which one predominant here? (c) Why is the boiling point of HF highest while that of HCl lowest?

Description : Use the information and data given below to answer the questions Stronger intermolecular forces result in higher boiling point Strength of London forces increases with the number of electrons in the molecule ... here? (c) Why is the boiling point of HF highest while that of HCl lowest?

Last Answer : Ans :( a) In the molecules HCl, HBr and HI, dipole-dipole interaction and London forces are present. (b) Dipole moment of HCl > HBr > HI but boiling point of HCl < HBr

Resonance structures of a molecule have (a) same arrangement of atoms (b) different arrangement of atoms (c) same number of paired electrons (d) different number of paired electrons

Description : Resonance structures of a molecule have (a) same arrangement of atoms (b) different arrangement of atoms (c) same number of paired electrons (d) different number of paired electrons

Last Answer : same arrangement of atoms same number of paired electrons

A(n) _____ bond forms when two atoms share one or more pairs of electrons?

Description : A(n) _____ bond forms when two atoms share one or more pairs of electrons?

Last Answer : covelent

How many lone pairs of electrons exist on the central atom in ammonia?

Description : How many lone pairs of electrons exist on the central atom in ammonia?

Last Answer : One lone pair. The central atom is N (nitrogen) which has 5valence electrons. Three of them are shared with 3 hydrogen atoms,leaving 2 electrons (1 lone pair) on the N.

Electrons from excited chlorophyll molecule of photosystem II are accepted first by

Description : Electrons from excited chlorophyll molecule of photosystem II are accepted first by

Last Answer : Electrons from excited chlorophyll molecule of photosystem II are accepted first by A. Quinone B. Ferredoxin C. Cytochrome-b D. Cytochrome-f

The first acceptor of electrons from an excited chlorophyll molecule of phtosystem II is

Description : The first acceptor of electrons from an excited chlorophyll molecule of phtosystem II is

Last Answer : The first acceptor of electrons from an excited chlorophyll molecule of phtosystem II is A. Quinone B. Cytochorme C. Iron-sulfur protein D. Ferredoxin

The first acceptor of electrons from an excited chlorophyll molecule of phtosystem II is

Description : The first acceptor of electrons from an excited chlorophyll molecule of phtosystem II is

Last Answer : The first acceptor of electrons from an excited chlorophyll molecule of phtosystem II is A. Quinone B. Cytochorme C. Iron-sulfur protein D. Ferredoxin

In `S_(2)` molecule the two unpaired electrons are present in

Description : In `S_(2)` molecule the two unpaired electrons are present in

Last Answer : In `S_(2)` molecule the two unpaired electrons are present in A. `pi` B. `pi^(**)` C. `sigma` D. `sigma^(**)`

What is the atom in a molecule of water that is more visited by the shared electrons?

Description : What is the atom in a molecule of water that is more visited by the shared electrons?

Last Answer : Oxygen has a low negative charge.

What molecule carries the high energy electrons excited by the sunlight into the Calvin Cycle.?

Description : What molecule carries the high energy electrons excited by the sunlight into the Calvin Cycle.?

Last Answer : Feel Free to Answer

In the water molecule are electrons are equally shared by hydrogen atoms and oxygen atoms?

Description : In the water molecule are electrons are equally shared by hydrogen atoms and oxygen atoms?

Last Answer : What is the answer ?

What molecule stores the high energy electrons removed from glucose in glycolysis?

Description : What molecule stores the high energy electrons removed from glucose in glycolysis?

Last Answer : Need answer

What molecule are the main electrons carriers of Krebs cycle?

Description : What molecule are the main electrons carriers of Krebs cycle?

Last Answer : NADH and FADH2

Electrons are excited in photosystem I. With what do these electrons combine to produce an energy-carrying molecule?

Description : Electrons are excited in photosystem I. With what do these electrons combine to produce an energy-carrying molecule?

Last Answer : NDHP+

A molecule whose electrons are distributed unsymmetrical is said to be (a) Ionised (b) Non-ionised (c) Polar (d) Non-polar

Description : A molecule whose electrons are distributed unsymmetrical is said to be (a) Ionised (b) Non-ionised (c) Polar (d) Non-polar

Last Answer : Ans:(c)

Heat transfer by conduction results due to the transfer of free electrons, kinetic energy & vibrational energy from one molecule to another. Conduction heat transfer cannot take place (A) Between two bodies in physical contact with each other (B) Between two bodies not in physical contact with each other (C) From one part of a body to the another part of the same body (D) Both 'b' & 'c'

Description : Heat transfer by conduction results due to the transfer of free electrons, kinetic energy & vibrational energy from one molecule to another. Conduction heat transfer cannot take place (A) Between two bodies in physical contact ... of a body to the another part of the same body (D) Both 'b' & 'c'

Last Answer : (B) Between two bodies not in physical contact with each other

The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is (a) iron-sulphur protein(b) ferredoxin (c) quinone (d) cytochrome.

Description : The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is (a) iron-sulphur protein(b) ferredoxin (c) quinone (d) cytochrome.

Last Answer : (c) quinone

Electrons from excited chlorophyll molecule of photosystem II are accepted first by (a) quinone (b) ferredoxin (c) cytochrome-b (d) cytochrome-f.

Description : Electrons from excited chlorophyll molecule of photosystem II are accepted first by (a) quinone (b) ferredoxin (c) cytochrome-b (d) cytochrome-f.

Last Answer : (a) quinone

Which of the following statements about benzene is correct? (a) All of the carbon atoms are sp3 hybridized. (b) It has no delocalized electrons. (c) The carbon-carbon bond length is longer than that of ethane. (d) It is a planar molecule.

Description : Which of the following statements about benzene is correct? (a) All of the carbon atoms are sp3 hybridized. (b) It has no delocalized electrons. (c) The carbon-carbon bond length is longer than that of ethane. (d) It is a planar molecule.

Last Answer : It is a planar molecule.

Which one of the following statements is WRONG? (A) A singlet or triplet state may result when one of the electrons from the HOMO is excited to higher energy levels (B) In an excited singlet state, the spin of the electron in the higher energy orbital is paired with the electron in the ground state orbital (C) Triplet excited state is more stable than the singlet excited state (D) When the electron from the singlet excited state returns to ground state, the molecule always shows fluorescence phenomenon

Description : Which one of the following statements is WRONG? (A) A singlet or triplet state may result when one of the electrons from the HOMO is excited to higher energy levels (B) In an ... the electron from the singlet excited state returns to ground state, the molecule always shows fluorescence phenomenon

Last Answer : (C) Triplet excited state is more stable than the singlet excited state

When radiation breaks an electron pair bond in a molecule and each fragment of the molecule gets one of the bond electrons, the molecular fragments that are formed are called: w) ions x) free radicals y) stable molecules z) gases

Description : When radiation breaks an electron pair bond in a molecule and each fragment of the molecule gets one of the bond electrons, the molecular fragments that are formed are called: w) ions x) free radicals y) stable molecules z) gases

Last Answer : ANSWER: X -- FREE RADICALS

What is elasticity in polymers generally related to amount of hydrogen bonding between different subunits number of subunits in the polymer chain its greater tensile strength the synthetic composure?

Description : What is elasticity in polymers generally related to amount of hydrogen bonding between different subunits number of subunits in the polymer chain its greater tensile strength the synthetic composure?

Last Answer : amount of hydrogen bonding between different subunitsnumber of subunits in the polymer chainits greater tensile strengththe synthetic composure

Which of the following terms refers to the number of molecules or ions attached to a central metallic atom? w) coordination number x) connection number y) bonding number z) none of these

Description : Which of the following terms refers to the number of molecules or ions attached to a central metallic atom? w) coordination number x) connection number y) bonding number z) none of these

Last Answer : ANSWER: W -- COORDINATION NUMBER

The isoelectric point of a protein is (a) the pH at which the protein molecule has no charges on its surface. (b) the pH at which a protein in solution has an equal number of positive and negative charges. (c) the electric charge under isothermal conditions. (b) None of these

Description : The isoelectric point of a protein is (a) the pH at which the protein molecule has no charges on its surface. (b) the pH at which a protein in solution has an equal number of positive and negative charges. (c) the electric charge under isothermal conditions. (b) None of these

Last Answer : the pH at which a protein in solution has an equal number of positive and negative charges

How difficult is it to replace the bonding done on a tooth?

Description : How difficult is it to replace the bonding done on a tooth?

Last Answer : You have to remove it and make a little larger restoration. If your'e getting bleachiing done at your dentist they should be addressing that. In general, if you have bleaching done you have to have an exam, ... be replaced, what won't lighten, etc. So ask them. Good luck your teeth will look great!