What is the atomic number of chlorine ?

What is the atomic number of chlorine ?
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Answer :

The atomic number of chlorine is 17 .
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Related questions

Which of the following elements has the atomic number greater than that of Phosphorus? (1) Aluminium (2) Silicon (3) Chlorine (4) Magnesium

Description : Which of the following elements has the atomic number greater than that of Phosphorus? (1) Aluminium (2) Silicon (3) Chlorine (4) Magnesium

Last Answer : (3) Chlorine Explanation: Chlorine is a chemical element with symbol Cl and atomic number 17. Phosphorus is a chemical element with symbol P and atomic number 15.

Compared to Chlorine, Bromine has: w) smaller atomic size x) higher density y) lower boiling point z) greater number of outer electrons

Description : Compared to Chlorine, Bromine has: w) smaller atomic size x) higher density y) lower boiling point z) greater number of outer electrons

Last Answer : ANSWER: X -- HIGHER DENSITY

What is the relative atomic mass of chlorine ?

Description : What is the relative atomic mass of chlorine ?

Last Answer : The relative atomic mass of chlorine is 35 .

Which of the following has the smallest atomic radius? w) iodine x) chlorine y) fluorine z) bromine

Description : Which of the following has the smallest atomic radius? w) iodine x) chlorine y) fluorine z) bromine

Last Answer : ANSWER: Y -- FLUORINE

Give reason: Atomic size of sodium atom is greater than that of chlorine atom.

Description : Give reason: Atomic size of sodium atom is greater than that of chlorine atom.

Last Answer : Sodium is in the 1 st group where as chlorine is in 17 th group. We know that the atomic size decreases down the group. Hence sodium atom has larger atomic size than that of chlorine atom.

Chlorine atom and chloride ions - (1) Have an equal number of protons (2) Have an equal number of electrons (3) Unequal number neutrons (4) reacts spontaneously with water

Description : Chlorine atom and chloride ions - (1) Have an equal number of protons (2) Have an equal number of electrons (3) Unequal number neutrons (4) reacts spontaneously with water

Last Answer : (1) Have an equal number of protons

45. When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from (1) Zero to + 1 and zero to –3 (2) Zero to +1 and zero to –5 (3) Zero to –1 and zero to + 5 (4) Zero –1 and zero to + 3

Description : 45. When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from (1) Zero to + 1 and zero to –3 (2) Zero to +1 and zero to –5 (3) Zero to –1 and zero to + 5 (4) Zero –1 and zero to + 3

Last Answer : Zero to –1 and zero to + 5

The oxidation number of chlorine in KClO4 is: w) -1 x) +3 y) +7 z) +1

Description : The oxidation number of chlorine in KClO4 is: w) -1 x) +3 y) +7 z) +1

Last Answer : ANSWER: C -- +7

With hydrocarbons, is chlorine the ONLY atom powerful enough to remove a hydrogen atom from an alkane?

Description : With hydrocarbons, is chlorine the ONLY atom powerful enough to remove a hydrogen atom from an alkane?

Last Answer : (Disclaimer: I had organic chemistry 10 years ago, so you may want to back this up with some googling) Flourine reacts with alkanes, but it is so reactive it is unpredictable; you don't know ... . It seems like you can get the more powerful acids to react with alkanes under the right conditions.

What happens when I treat benzene with chlorine and water?

Description : What happens when I treat benzene with chlorine and water?

Last Answer : It creates chlorine gas, which is very toxic. may I ask why you are asking?

(a) Define a balanced chemical equation. Why should an equation be balanced? (b) Write the balanced chemical equation for the following reaction: (i) Phosphorus burns in presence of chlorine to form phosphorus penta chloride. (ii) Burning of natural gas. (iii) The process of respiration. -Chemistry

Description : (a) Define a balanced chemical equation. Why should an equation be balanced? (b) Write the balanced chemical equation for the following reaction: (i) Phosphorus burns in presence of chlorine to form phosphorus penta chloride. (ii) Burning of natural gas. (iii) The process of respiration. -Chemistry

Last Answer : Answer. (a) Balanced chemical equation has an equal number of atoms of different elements in the reactants and products. According to law of conservation of mass, matter can neither be created nor be destroyed in a chemical ... C6H12O6 (s) + 6O2 (g) + 6H2O ---> 6CO2 (aq) + 12H2O (l) + energy

(a) Write electron dot diagram for chlorine (At No. 17) and calcium (At No. 20). Show the formation of calcium chloride by transfer of electrons. (b) Identify the nature of above compound’and explain three physical properties of such compound. -Chemistry

Description : (a) Write electron dot diagram for chlorine (At No. 17) and calcium (At No. 20). Show the formation of calcium chloride by transfer of electrons. (b) Identify the nature of above compound’and explain three physical properties of such compound. -Chemistry

Last Answer : (b) It is ionic compound. Physical properties 1.It is hard and solid. 2.It has high melting and boiling point. 3.It soluble in water.

What is the physical condition of chlorine ?

Description : What is the physical condition of chlorine ?

Last Answer : The physical state of chlorine is yellowish green gas.

Who Discovered Chlorine ?

Description : Who Discovered Chlorine ?

Last Answer : chlorine c. Shelley discovers.

In what year was chlorine discovered ?

Description : In what year was chlorine discovered ?

Last Answer : Chlorine was discovered in 1774 .

What is the valence of chlorine ?

Description : What is the valence of chlorine ?

Last Answer : Chlorine valence 1, 3, 5, 7 .

What is the boiling point of chlorine ?

Description : What is the boiling point of chlorine ?

Last Answer : Boiling point of chlorine - 34 degrees Celsius.

What is the melting point of chlorine ?

Description : What is the melting point of chlorine ?

Last Answer : Melting point of chlorine - 101 degree Celsius.

Where does chlorine come from ?

Description : Where does chlorine come from ?

Last Answer : Chlorine comes from the Greek word chloras.

How many chlorine atoms are present in chlorine molecule ?

Description : How many chlorine atoms are present in chlorine molecule ?

Last Answer : There are two chlorine atoms in the chlorine molecule.

What is the isotope of chlorine ?

Description : What is the isotope of chlorine ?

Last Answer : : The number of isotopes of chloris is 2

What is the signal of chlorine molecule ?

Description : What is the signal of chlorine molecule ?

Last Answer : Chlorine Atomic Signal Cl2.

Bleaching powder is prepared by passing – (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne

Description : Bleaching powder is prepared by passing – (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne

Last Answer : (1) Chlorine over slaked lime Explanation: Calcium hypochlorite (bleaching powder) is manufactured by the calcium process: 2Cl2 + 2Ca(OH)2 (slaked lime) Ca(OCl)2 + CaCl2 + 2H2O. Bleaching powder is actually a mixture of calcium hypochlorite and the basic chloride with some slaked lime.

Seaweeds are important source of – (1) fluorine (2) chlorine (3) bromine (4) iodine

Description : Seaweeds are important source of – (1) fluorine (2) chlorine (3) bromine (4) iodine

Last Answer : (4) iodine Explanation: Seaweed is a source of iodine, necessary for thyroid function and to prevent goitre. However, an excess of iodine is suspected in the heightened cancer risk in Japanese who consume a lot of the plant.

Which of the following is Colourless? (1) Chlorine (2) Oxygen (3) Phosphorus (4) Sulphur

Description : Which of the following is Colourless? (1) Chlorine (2) Oxygen (3) Phosphorus (4) Sulphur

Last Answer : (2) Oxygen

The Bhopal tragedy was caused by the gas - (1) phosgene (2) carbon monoxide (3) methyl isocyanate (4) chlorine

Description : The Bhopal tragedy was caused by the gas - (1) phosgene (2) carbon monoxide (3) methyl isocyanate (4) chlorine

Last Answer : (3) methyl isocyanate Explanation: The Bhopal disaster occurred on the night of 2-3 December 1984 at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh. Over 500,000 people were exposed to methyl isocyanate gas and other chemicals.

Most commonly used bleaching agent is – (1) Sodium chloride (2) Alcohol (3) Carbon dioxide (4) Chlorine

Description : Most commonly used bleaching agent is – (1) Sodium chloride (2) Alcohol (3) Carbon dioxide (4) Chlorine

Last Answer : (4) Chlorine Explanation: Chlorine is used to disinfect water and is part of the sanitation process for sewage and industrial waste. During the production of paper and cloth, it is used ... in water Bleaching powder is an important and a commonly used bleaching agent prepared from chlorine.

Non-metallic character increases from (1) Magnesium to Barium (2) Potassium to Cesium (3) Oxygen to Selenium (4) Sodium to Chlorine

Description : Non-metallic character increases from (1) Magnesium to Barium (2) Potassium to Cesium (3) Oxygen to Selenium (4) Sodium to Chlorine

Last Answer : (4) Sodium to Chlorine Explanation: The elements which lose electrons to form cations are known as metals. Metallic character decreases across a period as we move from left to right.

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 strongest oxidizing agent among the following is: (1) Chlorine (2) Iodine (3) Fluorine (4) Oxygen

Description : The strongest oxidizing agent among the following is: (1) Chlorine (2) Iodine (3) Fluorine (4) Oxygen

Last Answer : (3) Fluorine Explanation: An oxidizing agent is a chemical species that removes an electron from another species. Fluorine, having the largest positive value of electrode potential, is the strongest ... all halogens have a tendency to take up electrons and thus act as strong oxidizing agents.

Which one of the following does not form oxyacid? (1) Sulphur (2) Chlorine (3) Nitrogen (4) Fluorine

Description : Which one of the following does not form oxyacid? (1) Sulphur (2) Chlorine (3) Nitrogen (4) Fluorine

Last Answer : (4) Fluorine Explanation: Fluorine cannot form oxyacid because fluorine is more electronegative than oxygen. For oxygen to bind, it must be a positively charged ion.

The non-metal found in the liquid state is – (1) bromine (2) nitrogen (3) fluorine (4) chlorine

Description : The non-metal found in the liquid state is – (1) bromine (2) nitrogen (3) fluorine (4) chlorine

Last Answer : (1) bromine Explanation: Bromine belongs to the halogen group. It is the only non-metal element that is in a liquid form at room temperature. At room temperature it is a reddish brown fuming liquid with an unpleasant chlorine like smell.

Bleaching action of chlorine is by - (1) Decomposition (2) hydrolysis (3) reduction (4) oxidation

Description : Bleaching action of chlorine is by - (1) Decomposition (2) hydrolysis (3) reduction (4) oxidation

Last Answer : (4) oxidation Explanation: Chlorine bleaches by the process of oxidation. It needs moisture for its bleaching action. Chlorine reacts with water to form hydrochloric and hypochlorous acids.

Which one of the following elements is an example of noble gas? (1) Nitrogen (2) Hydrogen (3) Chlorine (4) Helium

Description : Which one of the following elements is an example of noble gas? (1) Nitrogen (2) Hydrogen (3) Chlorine (4) Helium

Last Answer : (4) Helium Explanation: Noble gas refers to any of the seven chemical elements that make up Group Villa of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and element 118 (temporarily named ununoctium [Uuo]).

The most electronegative element among the following is – (1) Fluorine (2) Sodium (3) Chlorine (4) Oxygen

Description : The most electronegative element among the following is – (1) Fluorine (2) Sodium (3) Chlorine (4) Oxygen

Last Answer : (1) Fluorine Explanation: Electronegativity of the elements using the Pooling Scale is as follows: Fluorine: 3.98, Oxygen: 3.44, Chlorine: 3.16, and Sodium: 0.93. Electronegativity increases down the group and decreases down the period.

Bleaching powder is made from - (1) Sulphur dioxide and gypsum (2) Chlorine and Charcoal (3) Soda ash and lime (4) Lime and Chlorine

Description : Bleaching powder is made from - (1) Sulphur dioxide and gypsum (2) Chlorine and Charcoal (3) Soda ash and lime (4) Lime and Chlorine

Last Answer : (4) Lime and Chlorine Explanation: The gas which is used in the preparation of bleaching powder is chlorine. It is a mixture of lime and calcium chloride.

A gas used as a disinfectant in drinking water is - (1) Hydrogen (2) Oxygen (3) Fluorine (4) Chlorine

Description : A gas used as a disinfectant in drinking water is - (1) Hydrogen (2) Oxygen (3) Fluorine (4) Chlorine

Last Answer : (4) Chlorine Explanation: Water chlorination is the process of adding chlorine or chlorine compounds such as sodium hypochlorite to water.

Which one of the following is a microelement? (1) Chlorine (2) Hydrogen (3) Nitrogen (4) Oxygen

Description : Which one of the following is a microelement? (1) Chlorine (2) Hydrogen (3) Nitrogen (4) Oxygen

Last Answer : (1) Chlorine Explanation: In analytical chemistry, a trace element or micro-element is an element in a sample that has an average concentration of less than 100 parts per million measured in atomic count or less than ... Cu), iron (Fe), chloride (C1), manganese (Mn), molybdenum (Mo) and zinc (Zn).

What product is formed when electricity is passed throughan aqueous solution of sodium chloride? (1) Sodium and water (2) Sodium oxide (3) Sodium and chlorine (4) Sodium hydroxide

Description : What product is formed when electricity is passed throughan aqueous solution of sodium chloride? (1) Sodium and water (2) Sodium oxide (3) Sodium and chlorine (4) Sodium hydroxide

Last Answer : (4) Sodium hydroxide Explanation: When electricity is passed through an aqueous solution of sodium chloride, it gives hydrogen, chlorine and sodium hydroxide as a product.

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.

Which of the following is used for refrigeration? (1) Sulphur dioxide (2) Chlorine (3) Freon (4) Phosphine

Description : Which of the following is used for refrigeration? (1) Sulphur dioxide (2) Chlorine (3) Freon (4) Phosphine

Last Answer : (3) Freon Explanation: Common refrigerants used in domestic refrigerators are Freon, neon and nitrogen. It flows through four components of refrigerator again and again.

Which of the following gases is most toxic? (1) Carbon dioxide (2) Carbon monoxide (3) Sulphur dioxide (4) Chlorine

Description : Which of the following gases is most toxic? (1) Carbon dioxide (2) Carbon monoxide (3) Sulphur dioxide (4) Chlorine

Last Answer : (2) Carbon monoxide Explanation: Carbon monoxide (CO) is a colourless, odorless, and tasteless gas that is slightly lighter than air. It is toxic to humans and animals when encountered in ... formation of groundlevel ozone. Carbon monoxide is colourless, odorless, and tasteless, but highly toxic.

Which gas does not form the part, of atmosphere? (1) Nitrogen (2) Helium (3) Chlorine (4) None of the above

Description : Which gas does not form the part, of atmosphere? (1) Nitrogen (2) Helium (3) Chlorine (4) None of the above

Last Answer : (3) Chlorine Explanation: The atmosphere of Earth is a layer of gases surrounding the planet Earth that is retained by Earth's gravity. The atmosphere protects life on Earth by absorbing ... temperature variations). Air is the name given to the atmosphere used in breathing and photosynthesis.

Bleaching action of chlorine is by - (1) decomposition (2) hydrolysis (3) reduction (4) oxidation

Description : Bleaching action of chlorine is by - (1) decomposition (2) hydrolysis (3) reduction (4) oxidation

Last Answer : (4) oxidation Explanation: Chlorine bleaches by the process of oxidation. It needs moisture for its bleaching action. Chlorine reacts with water to form hydrochloric and hypochlorous acids.

Tear gas used by the police to disperse the mob contains - (1) Carbon dioxide (2) Chlorine (3) Ammonia (4) Hydrogen sulphide

Description : Tear gas used by the police to disperse the mob contains - (1) Carbon dioxide (2) Chlorine (3) Ammonia (4) Hydrogen sulphide

Last Answer : (2) Chlorine Explanation: Tear gas, formally known as a lachrymatory agent, is a possibly lethal chemical weapon that stimulates the corneal nerves in the eyes to cause tears, pain, and even blindness.

The amount of Chlorine available in water after disinfection is called as – (1) free chlorine (2) residual chlorine (3) free available chlorine (4) combined available chlorine

Description : The amount of Chlorine available in water after disinfection is called as – (1) free chlorine (2) residual chlorine (3) free available chlorine (4) combined available chlorine

Last Answer : (2) residual chlorine Explanation: The word "residual" means "remainder" or "that which is left", and as the name suggests the chlorine residual is measure of the amount of chlorine ... system. Tests for chlorine residual are probably the most frequently performed tests at water treatment plants.

The substance that is added to make natural rubber strong and more bouncy is – (1) Polythene (2) Sponge (3) Sulphur (4) Chlorine

Description : The substance that is added to make natural rubber strong and more bouncy is – (1) Polythene (2) Sponge (3) Sulphur (4) Chlorine

Last Answer : (3) Sulphur Explanation: Vulcanization is a chemical process for converting rubber or related polymers into more durable materials via the addition of sulfur or other equivalent "curatives ... individual polymer chains. Vulcanized materials are less sticky and have superior mechanical 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.

Sea weeds are important source of – (1) iron (2) chlorine (3) bromine (4) iodine

Description : Sea weeds are important source of – (1) iron (2) chlorine (3) bromine (4) iodine

Last Answer : (4) iodine Explanation: Seaweed is a source of iodine, necessaly for thyroid function and to prevent goitre. However, an excess of iodine is suspected in the heightened cancer risk in Japanese who consume a lot of the plant, and even bigger risks in post-mempausal women.

0.3780g of organic chloro compound gave 0.5740g of silver chloride in carius estimation .Calculate the percentage of chlorine present in the compound.

Description : 0.3780g of organic chloro compound gave 0.5740g of silver chloride in carius estimation .Calculate the percentage of chlorine present in the compound.

Last Answer : % of chlorine = 35.5*mass of AgCl formed * 100/143.5 * mass of the substance = 35.5*0.5740*100/143.5*0.3780 = 19.6 %