Well, am not sure but..
teleportation , or dream journey or mind waves transportation
Answer:
(4) All atoms of a given element must have the same atomic number
Explanation:
Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.
However, when we talk about the atomic number of the ion, it is not equal to the number of electrons as electron can be gained or loosed.
This is why, more appropriately, the number of the protons which are present in the nucleus of the atom is called the atomic number.
Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.
Mass number = Number of protons + Number of neutrons
<u>Thus, atomic number of an element is an unique property of the element and it's atom.</u>
I have a helpful trick for such problems.
Step 1:
Write the equation asked with exact moles given in question,
PCl₃ + Cl₂ → PCl₅ --------(1)
Step 2:
Write equations given in data along with energies,
P₄ + 6Cl₂ → 4PCl₃ Δ<span>H = −1280 kj -----(2)
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P₄ + 10Cl₂ → 4PCl₅ ΔH<span> = −1774 kj -----(3)
Step 3:
Compare the equation 1 with eq 2 and 3 and modify eq 2 and 3 according to eq 1 both in terms of reactant and product and number of moles. For example in eq 1 PCl</span>₃ is on left hand side and its number of moles is one, so, modify eq, 2 according to eq 1 both in terms of moles and reactant product sides. i.e.
By inter converting eq 2, the sign of energy will change from negative to positive, and divide eq 2 with 4, to have its ratio's equal to eq 1
PCl₃ → 1/4 P₄ + 1.5 Cl₂ ΔH = +320 KJ
Same steps are done for eq 3, but in this case signs are not changed only moles are changed
1/4P₄ + 2.5Cl₂ → 1/4PCl₅ ΔH = −443.5 kj
Now,
Compare both last equations,
PCl₃ → 1/4 P₄ + 1.5 Cl₂ ΔH = +320 KJ
1/4P₄ + 2.5Cl₂ → 4/4PCl₅ ΔH = −443.5 kj
_____________________________________________
PCl₃ + Cl₂ → PCl₅ ΔH = -123.5 KJ
Is this supposed to be a question or something??? if so i need context.