Question

$<b><i><u> HOLA BRAINLIACS....⭐⭐⭐$
✨✨ CHEMISTRY QUESTIONS ✨✨

25 Points....✔

✴1. Why noble gases do not react? Which noble gas has its valency less than 8?

✴2. What is the alpha particle in Gold foil experiment by E. Rutherford?

✴3. What do you understand by basic radicals and acidic radicals? explain in detail.

✴4. What is the common name for Hemihydrate of calcium sulphate?

✴5. What are relative atomic mass of :
(check names in the attachment)


✔accurate answers needed
✔ don't spa.m
✔copy - paste not allowed
✔ detailed answers required.

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Answer 1

1.Noble gases are chemically stable since they dont have to gain, lose or share electrons.Helium is the noble gas having valency less than 8.

2.Physicist Ernest Rutherford established the nuclear theory of the atom with his gold-foil experiment. When he shot a beam of alpha particles at a sheet of gold foil, a few of the particles were deflected. He concluded that a tiny, dense nucleus was causing the deflections.

3.The ion formed after removal of Hydrogen ion (H+⁺ ion) from an acid is called acid radical. Ex: When HCl loses H⁺ ion, it forms Cl-⁻ which is an acid radical. The ion formed after removal of hydroxide ions (OH-⁻ ions) from a base is called basic radical.

4.the common name for Hemihydrate of calcium sulphate is Plaster of Paris.

5.where is the attachment?

Answer 2

1. The noble gases are the chemical elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore, they rarely react with other elements since they are already stable.

4. Calcium sulfate hemihydrate. Chemical Names: Calcium sulfate hemihydrate; Gypsum hemihydrate; 10034-76-1; Calcium sulphate hemihydrate; UNII-3RW091J48V; 3RW091J48V More... ... PLASTER OF PARIS is a white or yellowish, finely divided, odorless powder consisting mostly or entirely of calcium sulfate hemihydrate, CaSO4*1/2H2O ...