Which halogen's zeron number is not variable ?

Which halogen's zeron number is not variable ?
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Answer :

The number of fluorine germs is not variable.
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Which one of the following statements concerning elements in the Periodic Table is correct? A Elements of the same group all have the same number of electrons in the outermost occupied electron shell. B Elements of Group 16 occur as cations in ionic compounds. C Oxides of elements in Groups 16 and 17 are basic. D The halogens (Group 17) are all gases at room temperature. E The Group 13 elements are all metals.

Description : Which one of the following statements concerning elements in the Periodic Table is correct? A Elements of the same group all have the same number of electrons in the outermost occupied electron shell. B ... (Group 17) are all gases at room temperature. E The Group 13 elements are all metals.

Last Answer : D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

Newlands' table, the elements were placed with the halogens - (1) Mn and As (2) Fe and Se (3) Ce and La (4) Co and Ni

Description : Newlands' table, the elements were placed with the halogens - (1) Mn and As (2) Fe and Se (3) Ce and La (4) Co and Ni

Last Answer : (4) Co and Ni Explanation: Newlands' Law of Octaves suffered from lot of limitations, In order to fit elements into his table, Newlands ad justed two elements in the same slot, but also put some unlike elements under the same note.

The most reactive among the halogens is (1) Fluorine (2) Chlorine (3) Bromine (4) Iodine

Description : The most reactive among the halogens is (1) Fluorine (2) Chlorine (3) Bromine (4) Iodine

Last Answer : (1) Fluorine Explanation: Fluorine is one of the most reactive elements in existence, attacking otherwise inert materials such as glass, and forming compounds with the heavier noble gases. It is a ... react with glass in the presence of small amounts of water to form silicon tetrafluoride (SiF4).

The most reactive among the halogens is - (1) Fluorine (2) Chlorine (3) Bromine (4) Iodine

Description : The most reactive among the halogens is - (1) Fluorine (2) Chlorine (3) Bromine (4) Iodine

Last Answer : (1) Fluorine Explanation: As a general rule, fluorine is the most reactive halogen and astatine is the least reactive. All halogens form Group 1 salts with similar properties.

The most reactive among the halogens is - (1) Fluorine (2) Chlorine (3) Bromine (4) Iodine

Description : The most reactive among the halogens is - (1) Fluorine (2) Chlorine (3) Bromine (4) Iodine

Last Answer : (1) Fluorine Explanation: As a general rule, fluorine is the most reactive halogen and astatine is the least reactive. All halogens form Group 1 salts with similar properties.

Why is an organic compound fused with Sodium for testing nitrogen,halogens and sulphur ?

Description : Why is an organic compound fused with Sodium for testing nitrogen,halogens and sulphur ?

Last Answer : On fusing with sodium metal the elements presents in an organic compounds are converted in to ionic compounds of sodium which are water soluble which can be filtered and detected by the respective tests.

Explain why Halogens have very high negative electron gain enthalpy?

Description : Explain why Halogens have very high negative electron gain enthalpy?

Last Answer : Ans.The electron gain enthalpy for halogens is highly negative because they can acquire the nearest stable noble gas configuration by accepting an extra electron.

why do noble gases have bigger atomic size than halogens?

Description : why do noble gases have bigger atomic size than halogens?

Last Answer : Ans.Noble gases have higher atomic size than halogens because Van der Waals radii are bigger than covalent radii.

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

Halogens have maximum negative electron gain enthalpy in the respective periods in the P. T Why ?

Description : Halogens have maximum negative electron gain enthalpy in the respective periods in the P. T Why ? 

Last Answer : Ans Due to smallest size and high effective nuclear charge , readily accept one electron  to acquire noble gas electronic configuration  

How does alkali metals react with halogens?

Description : How does alkali metals react with halogens?  

Last Answer : The alkali metals readily react vigorously with halogens to form ionic halides, M+X-. However, lithium halides are somewhat covalent. It is because of the high polarisation capability of lithium ion ( ... size can be easily distorted, among halides, lithium iodide is the most covalent in nature. 

The boiling points of the halogens increase going from F2 to I2. What type of intermolecular forces are responsible for this trend? w) permanent dipole x) hydrogen bonding y) ion-ion attraction z) London dispersion forces

Description : The boiling points of the halogens increase going from F2 to I2. What type of intermolecular forces are responsible for this trend? w) permanent dipole x) hydrogen bonding y) ion-ion attraction z) London dispersion forces

Last Answer : ANSWER: Z -- LONDON DISPERSION FORCES

AS A GROUP, the halogens have the largest: w) atomic radii x) Boiling points y) electronegativities z) ionization energies

Description : AS A GROUP, the halogens have the largest: w) atomic radii x) Boiling points y) electronegativities z) ionization energies

Last Answer : ANSWER: Y -- ELECTRONEGATIVITIES

Which of the following groups of elements have an OUTER ELECTRONIC configuration of S-2-P-2? w) halogens x) Nitrogen-Phosphorus Group y) Carbon-Silicon Group z) Boron-Aluminum Group

Description : Which of the following groups of elements have an OUTER ELECTRONIC configuration of S-2-P-2? w) halogens x) Nitrogen-Phosphorus Group y) Carbon-Silicon Group z) Boron-Aluminum Group

Last Answer : ANSWER: Y -- CARBON-SILICON GROUP

The elements that have an outer electron configuration ns2 (read: n - s - 2) are called: w) halogens x) transition metals y) alkaline earths z) noble gases

Description : The elements that have an outer electron configuration ns2 (read: n - s - 2) are called: w) halogens x) transition metals y) alkaline earths z) noble gases

Last Answer : ANSWER: Y -- ALKALINE EARTHS

Excluding Astatine, which halogen does NOT replace the other halogens from their compounds?

Description : Excluding Astatine, which halogen does NOT replace the other halogens from their compounds?

Last Answer : ANSWER: IODINE

Which of the following halogens does NOT replace the other halogens from their compounds? w) fluorine x) iodine y) bromine z) chlorine

Description : Which of the following halogens does NOT replace the other halogens from their compounds? w) fluorine x) iodine y) bromine z) chlorine

Last Answer : ANSWER: X -- IODINE

The elements in group 1A of the periodic table are called: w) halogens x) alkaline earths y) alkali metals z) rare earths

Description : The elements in group 1A of the periodic table are called: w) halogens x) alkaline earths y) alkali metals z) rare earths

Last Answer : ANSWER: Y -- ALKALI METALS

The most reactive among the halogens is (1) Fluorine (2) Chlorine (3) Bromine (4) Iodine

Description : The most reactive among the halogens is (1) Fluorine (2) Chlorine (3) Bromine (4) Iodine

Last Answer : Fluorine

In organic compound, halogens are estimated by which method? -General Knowledge

Description : In organic compound, halogens are estimated by which method? -General Knowledge

Last Answer : The answer is 'Carius method'

In organic compound, halogens are estimated by which method? -General Knowledge

Description : In organic compound, halogens are estimated by which method? -General Knowledge

Last Answer : answer:

Which of the following properties among halogens decreases from fluorine to iodine ?

Description : Which of the following properties among halogens decreases from fluorine to iodine ?

Last Answer : Which of the following properties among halogens decreases from fluorine to iodine ? A. Eelectronegativity B. Electron ... energy D. (1) & (3) both

The reactivity of compound `Z` with different halogens under appropriate conditions is gives below- The observed pattern of electrophilic substitution

Description : The reactivity of compound `Z` with different halogens under appropriate conditions is gives below- The observed pattern of electrophilic substitution

Last Answer : The reactivity of compound `Z` with different halogens under appropriate conditions is gives below- ... the electronic effect of the tert-butyl group

The order of stability of halides of sulphur with different halogens is

Description : The order of stability of halides of sulphur with different halogens is

Last Answer : The order of stability of halides of sulphur with different halogens is A. `I^(-) gt Br^(-) gt Cl^(-) gt F^(-)` ... `F^(-) gt Cl^(-) gt I^(-) Br^(-)`

The order of stability of halides of sulphur with different halogens is

Description : The order of stability of halides of sulphur with different halogens is

Last Answer : The order of stability of halides of sulphur with different halogens is A. `I^(-) gt Br^(-) gt Cl^(-) gt F^(-)` ... `F^(-) gt Cl^(-) gt I^(-) Br^(-)`

Consider a compound `CsXY_2` where X and Y are halogens. Which of the following statements is /are correct ? (i)X and Y have different oxidation state

Description : Consider a compound `CsXY_2` where X and Y are halogens. Which of the following statements is /are correct ? (i)X and Y have different oxidation state

Last Answer : Consider a compound `CsXY_2` where X and Y are halogens. Which of the following statements is /are correct ? (i)X ... ) C. Only (ii) D. (i) and (iii)

With respect to halogens, four statements are given below: (P) The bond dissociation energies for halogens are in the order: `I_(2) lt F_(2) lt Br_(2)

Description : With respect to halogens, four statements are given below: (P) The bond dissociation energies for halogens are in the order: `I_(2) lt F_(2) lt Br_(2)

Last Answer : With respect to halogens, four statements are given below: (P) The bond dissociation energies for halogens are in ... ,III,IV C. II,III,IV D. I,III

Among the following reactoin of hydrogen with halogens, the one that requires a catalyst is

Description : Among the following reactoin of hydrogen with halogens, the one that requires a catalyst is

Last Answer : Among the following reactoin of hydrogen with halogens, the one that requires a catalyst is A. `H_2 + F_2 to ... I_2 to 2HI` D. `H_2 + Br_2 to 2HBr`

Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. Pseudo halogens can acts as ligands

Description : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. Pseudo halogens can acts as ligands

Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. ... and C black D. `Na(CN)_2^-`

Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. Pseudo halogens can acts as ligands

Description : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. Pseudo halogens can acts as ligands

Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. ... NaBr C. (C) NaF D. (D) Nal

Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. Pseudo halogens can acts as ligands

Description : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. Pseudo halogens can acts as ligands

Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. ... . H_2O` D. (D) None of these

Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. Pseudo halogens can acts as ligands

Description : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. Pseudo halogens can acts as ligands

Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides ... . `NaCN, NaOCN` D. `HCOONa, NH_3`

`DeltaH_"vaporisation"` (KJ/mol) are given for the hydrides of halogens in the following graph. The hydride HF will correspond to

Description : `DeltaH_"vaporisation"` (KJ/mol) are given for the hydrides of halogens in the following graph. The hydride HF will correspond to

Last Answer : `DeltaH_"vaporisation"` (KJ/mol) are given for the hydrides of halogens in the following graph. The hydride HF will ... . (B)Q C. (C)R D. (D)S

`F_2` reacts with `H_2O` as follows: `F_2+H_2O to H^(+) + F^(-) +O_2` Which of the following halogens shows same reaction but In opposite direction?

Description : `F_2` reacts with `H_2O` as follows: `F_2+H_2O to H^(+) + F^(-) +O_2` Which of the following halogens shows same reaction but In opposite direction?

Last Answer : `F_2` reacts with `H_2O` as follows: `F_2+H_2O to H^(+) + F^(-) +O_2` Which of the following halogens shows ... ? A. `Br_2` B. `Cl_2` C. `I_2` D. All

Correct order of boiling point of halogens is

Description : Correct order of boiling point of halogens is

Last Answer : Correct order of boiling point of halogens is A. `F_2 lt Cl_2 lt Br_2 lt I_2` B. `Cl gt F_2 gt Br_2 ... Br_2 gt I_2` D. `Cl_2 lt F_2 lt Br_2 lt I_2`

Sodium extract is heated with concentrated `HNO_(3)` before testing for halogens because :

Description : Sodium extract is heated with concentrated `HNO_(3)` before testing for halogens because :

Last Answer : Sodium extract is heated with concentrated `HNO_(3)` before testing for halogens because : A. Ag reacts ... )` and hence do not interfere in the test.

Hydrogen shows similarity with alkali metals as well as halogens.

Description : Hydrogen shows similarity with alkali metals as well as halogens.

Last Answer : Explain : Hydrogen shows similarity with alkali metals as well as halogens.

What is the symbol of halogens?

Description : What is the symbol of halogens?

Last Answer : Need answer

What is the most active group of nonmetals noble gases alkaline earth halogens alkali metals?

Description : What is the most active group of nonmetals noble gases alkaline earth halogens alkali metals?

Last Answer : The most active metals are alkali metals.The most active nonmetals are halogens.

Who has the most active group of nonmetals noble gases alkaline earth halogens alkali metals?

Description : Who has the most active group of nonmetals noble gases alkaline earth halogens alkali metals?

Last Answer : Kevin

Do displacement reactions only occur between halogens?

Description : Do displacement reactions only occur between halogens?

Last Answer : Also other elements can be involved.

What are two symbols for halogens?

Description : What are two symbols for halogens?

Last Answer : l,komkl

Do halogens have a high or low boiling point?

Description : Do halogens have a high or low boiling point?

Last Answer : Low

In an outline the subtopics are alkali metals and halogens what would the main topic of the outline be?

Description : In an outline the subtopics are alkali metals and halogens what would the main topic of the outline be?

Last Answer : hi

What are two symbols for halogens?

Description : What are two symbols for halogens?

Last Answer : l,komkl

Which gas is used in the preparation of soft drinks? A. Oxygen B. Carbon dioxide C. Nitrogen D. Halogens

Description : Which gas is used in the preparation of soft drinks? A. Oxygen B. Carbon dioxide C. Nitrogen D. Halogens

Last Answer : ANSWER: B

Which gas is used in the preparation of soft drinks? A. Oxygen B. Carbon dioxide C. Nitrogen D. Halogens

Description : Which gas is used in the preparation of soft drinks? A. Oxygen B. Carbon dioxide C. Nitrogen D. Halogens

Last Answer : ANSWER: B

Which gas is used in the preparation of soft drinks? A. Oxygen B. Carbon dioxide C. Nitrogen D. Halogens

Description : Which gas is used in the preparation of soft drinks? A. Oxygen B. Carbon dioxide C. Nitrogen D. Halogens

Last Answer : ANSWER: B

Which gas is used in the preparation of soft drinks? A. Oxygen B. Carbon dioxide C. Nitrogen D. Halogens

Description : Which gas is used in the preparation of soft drinks? A. Oxygen B. Carbon dioxide C. Nitrogen D. Halogens

Last Answer : ANSWER: B

Enzymes contain 1. Peptide bonds 2. Amino acids 3. Halogens 4. Fatty acids The correct answers are: (a) 1 and 4 (b) 1,3 and 4 (c) 1 and 2 (d) 2, 3 and 4

Description : Enzymes contain 1. Peptide bonds 2. Amino acids 3. Halogens 4. Fatty acids The correct answers are: (a) 1 and 4 (b) 1,3 and 4 (c) 1 and 2 (d) 2, 3 and 4

Last Answer : Ans:(c)