How many protons, neutrons, and electrons are in the following elements? What el

Question

How many protons, neutrons, and electrons are in the following elements? What element symbols do Q, X, and Y represent?

(a) 10847 Q
protons___________
neutrons _________
electrons_________
symbol___________

(b) 13153 X
protons___________
neutrons _________
electrons_________
symbol___________

(c) 4120 Y
protons___________
neutrons _________
electrons_________
symbol___________

Fluorite, a mineral of calcium, is a compound of the metal with fluorine. Analysis shows that a 2.20 g sample of fluorite contains 1.69 g calcium. Calculate the following.

(a) mass of fluorine in the sample

- g

(b) mass fraction of calcium and fluorine in fluorite

- calcium
  
- fluorine
  
(c) mass percent of calcium and fluorine in fluorite

- calcium

- %

- fluorine

- %

Explanation / Answer

a) Q contains 47 electros, 47 protons and 108-47 =61 neutrons and the elements is Silver (Ag)

b) X contains 53 electrons, 53v protoons and 131-53=78 neutrons, The atom is Iodines (I)

c) Y contains 20 electrons, 20 protons and 41-20 =21 neutrons and the atom is Caclium 41 isotope

II

2.2 gms of sampe contains 1.69 gms of calcium and the rest is fluorine, fluroine =2.2-1.69= 0.51gms

mass fractino of Calcium = 1.69/2.2=0.7681, mass fraction of fluorine =0.51/2.2 = 0.2319

Mass percent of Calcium = 0.7681*100= 76.81, mass percent of fluorine =0.2319*100= 23.19

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