1s2 2s2 2p3
1s2 2s2 2p4
1s2 2s2 2p6
1s², 2s², 2p⁴
Electronic configuration is the distribution of electrons of an atom in atomic orbitals. As we know Oxygen is a non metal and is present in group 6 and period 2 with atomic number 8. The atomic number in fact specifies the number of protons. Hence, for a neutral oxygen atom there must be 8 electrons to balance the charges of protons.
These 8 electrons are distributed in two main energy levels i.e. n = 1 and 2 and sub energy levels i.e. s and p. According to certain rules like Aufbau Principle, Pauli's Exclusion Principle and Hund's Rule the electronic configuration for eight electrons is as,
1s², 2s², 2px², 2p¹, 2p¹
The electronic configuration for oxygen is 1s2 2s2 2p4.
The electron configuration for oxygen is 1s2 2s2 2p4.
In the electron configuration, the numbers represent the energy levels (1s, 2s, 2p), and the superscripts represent the number of electrons in each orbital. The electron configuration follows the Aufbau principle, which states that electrons fill the lowest energy levels first.
In the case of oxygen, there are 8 electrons in total. The first two electrons fill the 1s orbital, the next two fill the 2s orbital, and the remaining four fill the 2p orbital (with two electrons each in the three 2p orbitals).
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Answer:
Tin: 54.3%
Zinc: 45.7%
Explanation:
The molar masses of the elements are:
Tin: Sn = 117.710 g/mol
Zinc: Zn = 65.409 g/mol
Fluorine: F = 18.998 g/mol
The fluorine gas in excess, so the reaction consumes all the alloy, and all the tin is converted to SnF₄ and all the zinc is converted to ZnF₂. The molar masses of the fluorides are:
SnF₄ = 117.710 + 4*18.998 = 193.702 g/mol
ZnF₂ = 65.409 + 2*18.998 = 103.405 g/mol
If we call x the number of moles of SnF₄, and y the number of moles of ZnF₂, the total mass can be calculated knowing that the mass is the number of moles multiplied by the molar mass:
193.702x + 103.405y = 2.489
The number of moles of Sn is the same as SnF₄ (1:1), and also the number of moles of Zn is the same as ZnF₂ (1:1), so the mass of the alloy:
117.710x + 65.409y = 1.540
if we multiply it by -1.581 and sum with the other equation:
117.710x*(-1.581) + 65.409y*(-1.581) + 193.702x + 103.405y = 1.540*(-1.581) + 2.489
7.60249x = 0.05426
x = 0.0071 mol of Sn
117.710*0.0071 + 65.409y = 1.540
65.409y = 0.704259
y = 0.0108 mol of Zn
The masses are the molar mass multiplied by the number of moles:
Sn: 117.710*0.0071 = 0.836 g
Zn: 65.409*0.0108 = 0.704 g
The percent composition is the mass of the substance divided by the total mass multiplied by 100%:
Sn: (0.836/1.540)*100% = 54.3%
Zn: (0.704/1.540)*100% = 45.7%