Answer:
i) 24.305 u
iv) The number of protons determines an element's atomic number and is used to distinguish one element from another.
Answer:
Metals are the only substances that use metallic bonds among their atoms.
Explanation:
While many elements are commonly known as metals, including iron, aluminum, gold, silver and nickel, metals include a variety of other elements as well.
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Answer:
Explanation:
The expression for Bohr energy of the hydrogen-like species is:
Where, Z is the atomic number of the element
For, , Z = 2
For lowest energy, n = 1
Thus, Applying the values as:-
Molar mass <span>CH2BrCH2Br = 188.0 g/mol
1 mole ---------- 188.0 g
</span>0.500 moles ----- ?
mass = 0.500 * 188.0 / 1
= 94.0 g
Answer C
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