### 【】How Many Valence Electrons Does Calcium(Ca) Have?||number of valence electrons in calcium

We know that the atomic number ofcalciumis 20.So calciumhas 20 protons and 20 electrons as the charge of electrons and protons are equal but opposite in nature.The charge of proton is +1 and the charge of electron is -1.

Valence shell can be found from the highest number of principal quantum number.You know that principal quantum number is expressed by n.

### 【】How Many Valence Electrons Does Selenium (Se) Have?|| Selenium (Se) Valence Electrons

How many valence electrons does selenium (Se) have? Answer: Selenium has six valence electrons. Explanation: Now we are going to know  how many  valence electrons  selenium  have in just 5 steps. Add caption              Step-1: First, find the atomic number of  selenium  from periodic table. From periodic table ,we see that the atomic number of  selenium  is 34.                  Step-2: We know that the atomic number of  selenium  is 34.So  selenium  has 34 protons and 34 electrons as the charge of electrons and protons are equal but opposite in nature.The charge of proton is +1 and the charge of electron is -1.                 Step-3: Now write the electron configuration of  selenium   . Se(34)=1s²2s²2p⁶3s²3p⁶4s²3d¹º4p⁴ Rewrite this from low to high value of n. Se(34)=1s²2s²2p⁶3s²3p⁶ 3d¹º 4s² 4p⁴                 Step-4: Se(34)=1s²2s²2p⁶3s²3p⁶ 3d¹º

### 【●】H2SO4 + NaOH ||Sulfuric acid(H2SO4) and Sodium hydroxide(NaOH)–What is the reaction between sulfuric acid and sodium hydroxide?

Sulfuric acid and Sodium hydroxide Hello,you are in right place to know about the reaction between sulfuric acid and sodium hydroxide. Sulfuric acid is an acid because it has hydrogen ion.The formula for sulfuric acid is H₂SO₄.It is a strong acid. Sodium hydroxide is a base because it has hydroxide ion.The chemical formula for sodium hydroxide is NaOH.It is a strong base. Read this:CO Lewis Structure                 Sulfuric acid(H2SO4) and Sodium hydroxide(NaOH)  Acid reacts with base to form salt and water.This type of reaction is called acid base neutralization reaction. In case of sulfuric acid and sodium hydroxide,acid-base neutralization reaction  will happen. Sulfuric acid reacts with sodium hydroxide and produce sodium sulphate(Na₂SO₄) and water(H₂O).Here  sodium sulphate(Na₂SO₄) is a salt beacause its positive part has come from base and negative part has come from acid. H₂SO₄ +2  NaOH =Na₂SO₄ +2H₂O Which salt is produced

### 【】How to Convert propene to propyne and propyne to propene conversion

August 19, 2018
How to Convert Propyne to Propene Propyne reacts with hydrogen (H₂) in presence of  Pd and BaSO₄ at 25ºc temperature and produce propene(CH₃-CH=CH₂). Here BaSO4 acts as catalyst poison towards Pd catalyst reducing it's catalytic action and controls the upto first stage. How to Convert Propene to Propyne          Step-1: Propene(CH₃-CH=CH₂) reacts with Br₂ in presence of CCl₄ and produce 1,2-dibromo propane( CH₃-CH(Br)CH₂Br).             Step-2: 1,2-dibromo propane( CH₃-CH(Br)CH₂Br) reacts with (alc)KOH and produce 1-bromo propene-1(CH₃-CH=CH-Br).                        Step-3: 1-bromo propene-1(CH₃-CH=CH-Br) reacts with sodamide and produce propyne. Next ● How to find percentage

### 【】How to Convert Ethene to Ethanoic Acid or Acetic Acid||How Ethanoic Acid Is Prepared from Ethene

Read more: what the eck wow

How to Convert Ethene to Ethanoic acid or Acetic Acid Answer: To convert ethene to ethanoic acid,we will adopt four steps:              Step-1: Ethene reacts with HBr and we get 1-bromo ethane.            Step-2: 1-bromo ethane reacts with aqueous KOH and we get ethanol.            Step-3: Ethanol is oxidized by K₂Cr₂O₇ plus H₂SO₄ and we get ethanal.            Step-4: Again,ethanal is oxidized by K₂Cr₂O₇ plus H₂SO₄ and we get ethanoic acid or acetic acid. Now see all the steps at a glance. How to convert ethene to ethanoic acid Next Recommended Posts: ● How to draw lewis structure ● SO2 Lewis Structure ◆ CO Lewis Structure ◆ CO2 Lewis Structure ◆ How to find percentage

### 【 】Hydrochloric Acid and Sodium Hydroxide||Balanced Equation for Hydrochloric acid and Sodium Hydroxide

Hydrochloric Acid and Sodium Hydroxide Hello,you are in right place to know about the reaction between hydrochloric acid and sodium hydroxide. Hydrochloric acid is an acid because it has hydrogen ion.The formula for hydrochloric acid is HCl.It is a strong acid. Sodium hydroxide is a base because it has hydroxide ion.The chemical formula for sodium hydroxide is NaOH.It is a strong base. Hydrochloric acid (HCl) and Sodium hydroxide(NaOH) Acid reacts with base to form salt and water.This type of reaction is called acid base neutralization reaction. In case of hydrochloric acid and sodium hydroxide,acid-base neutralization reaction will happen. Hydrochloric acid reacts with sodium hydroxide and produce sodium chloride(NaCl) and water(H₂O).Here sodium chloride(NaCl) is a salt beacause its positive part (Na+)has come from base and negative part(Cl-) has come from acid. HCl+ NaOH =NaCl +H₂O Hydrochloric Acid and Sodium Hydroxide Balanced Equation Now I will balance hydrochlor

### 【 】SO2 Lewis Structure ,Valence Electrons ,Formal Charge ||Lewis Structure for SO2 (Sulfur Dioxide)

SO2 Lewis Structure   Answer: In SO2 Lewis structure,there are two double bonds that are going from the atom sulphur to oxygens. In SO2 Lewis structure ,there are totally five lone pairs electrons.The each  oxygen has two lone pairs and the sulphur atom has one lone pair. In SO2 Lewis structure ,the oxygen atoms follow the octet rule but the sulfur atom don't follow the octet rule.It has more than eight electrons. Explanation: Hello,today I am going to draw the SO2 Lewis structure   in just five steps.           SO2 Lewis Structure Setup Step-1: To draw the SO2 Lewis structure ,  we have to find out the SO2  valence electrons   first.We express valence electrons as dots in lewis dot structure. To get the valence electrons of sulfur,we need to look at the electronic configuration of sulfur. S(16)=1s²2s²2p⁶ 3s² 3p⁴ 3d The highest value of principal quantum number here is n=3. The highest value of principal quantum number ,n , indicates the valence sh

### 【 】CO Lewis Structure ,Valence Electrons ,Formal Charge ||Carbon Monoxide Lewis Dot Structure

CO Lewis Structure Answer: Today we are going to learn to draw CO Lewis structure   (Carbon monoxide Lewis structure) in just few steps. CO Lewis Structure Before we begin,can you tell me how many valence electrons does C and O atom have? For finding the answer of that question,we have  to look at the Periodic Table below. We have to bear in mind that  within any given column,all the elements have the same number of valence electrons. To get valence electrons' number,all we have to do is to count the columns starting from left.Skip the transitional metals, and remember that the only exception to this is helium who has only two valence electrons, not 8. Now find carbon in the Periodic Table.Remember that it's symbol is 'C'.See it in the 4th Column. That tells us that it has 4 valence electrons. Now find oxygen in the Periodic Table.Remember its symbol is O.See it in the 6th Column.That tells us that it has

### 【】Electron Configuration of Sulphur (S)

January 11, 2019
Electron Configuration of Sulphur (S) Answer: Electron configuration of sulphur (S) is  1s² 2s²  2p⁶ 3s² 3p⁴ . Explanation: To do or find or writing electronic configuration of  Sulphur (S),we will follow just 5 steps.                    Step-1: To do electron configuration of sulphur, we have to know the atomic number of   sulpur(S) . The atomic number of  sulphur  is 16.So  sulpur   has 16 electrons and 16 protons. Electron configuration Look how I find the electron configuration for  sulphur . This process is applicable for all the elements of the periodic table.                                             Step-2: ( How do you remember the order of electron configurations?) Now we have to memorize the following sequence of the orbitals. ss    ps ps  dps  dps    fdps  fdps fdps fdps…. In a line- ss  ps ps  dps dps  fdps fdps  fdps fdps fdps fdps…….                    Step-3: Now we have to first numer the s-orbital (s

### 【 】Sodium Hydroxide and Sulfuric Acid Balanced Equation||Balanced Chemical Equation for Sulfuric Acid And Sodium Hydroxide

Sodium Hydroxide and Sulfuric Acid Balanced Equation Now I will balance sulfuric acid and sodium hydroxide reaction. Step-1:write the reaction. H₂SO₄ + NaOH —–>Na₂SO₄ +H₂O Step-2:In the left side, we have  H SO₄  Na O To balance this reaction means we need to equalize the number of these above atoms and polyatomic ion. Step-3:Now balance Na atom first.In the left hand side,we have one Na but in the right side,we have two Na.So to balance Na ,we need to put 2 before NaOH in the left side. H₂SO₄ +2 NaOH —–>Na₂SO₄ + H₂O Step-3:Now balance H. After step 3 we are getting … H₂SO₄ +2 NaOH —–>Na₂SO₄ + H₂O In the left hand side,we have 4 hydrogens but in the right side ,we have 2 hydrogen's.So we need to place 2 before  H₂O in the right side. So we are getting… H₂SO₄ +2 NaOH —–>Na₂SO₄ +2 H₂O Step-4:Now balance SO4  Ater step 3, we are getting… H₂SO₄ +2 NaOH —–>Na₂SO₄ +2 H₂O In the left side ,we have one  SO₄   and in the