Ca²⁺
Ionization energy is defined as the minimum amount of energy required to knock out the electron from valence shell of an atom in its gaseous state. While, second Ionization energy is defined as the amount of energy required to knock out the second electron from an ion containing +1 charge in gaseous state.
Among given options Ca²⁺ is the correct choice because the calcium has lost two electrons i.e. first electron was removed by providing first ionization energy i.e.
Ca + 1st IE → Ca¹⁺ + 1 e⁻
and second electron is was removed by providing second ionization energy i.e.
Ca ¹⁺ + 2nd IE → Ca²⁺ + 1 e⁻
is formed by providing the second ionization energy to remove an electron.
Further Explanation:
The energy that is needed to remove the most loosely bound valenceelectrons from the isolated neutral gaseous atom is known as the ionization energy. It is denoted by IE. The value of IE is related to the ease of removing the outermost valence electrons. If these electrons are removed so easily, small ionization energy is required and vice-versa. It is inversely proportional to the size of the atom.
Ionization energy is further represented as first ionization, second ionization and so on. When the first electron is removed from a neutral, isolated gaseous atom, the energy needed for the purpose is known as the first ionization energy, written as . Similarly, when the second electron is removed from the positively charged species (cation), the ionization energy is called the second ionization energy and so on.
The neutral atom corresponding to is calcium. If second ionization energy is supplied to calcium atom, it results in the removal of two electrons and thus is formed. So can be formed by providing second ionization energy. to the neutral atom.
The neutral atom corresponding to is nitrogen. If second ionization energy is supplied to nitrogen, it results in the formation of, not . So cannot be formed by providing the second ionization energy to the neutral atom.
The neutral atom corresponding to is iron. If second ionization energy is supplied to the iron atom, it results in the formation of , not . So cannot be formed by providing the second ionization energy to the neutral atom.
The neutral atom corresponding to is sulfur. If second ionization energy is supplied to the sulfur atom, it results in the formation of , not . So cannot be formed by providing the second ionization energy to the neutral atom.
Therefore, the only ion that can be formed by supplying the second ionization energy is .
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Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Periodic classification of elements
Keywords: second ionization energy, Ca2+, N3-, Fe3+, S2-, IE1, IE2, first electron, second electron, neutral atom., nitrogen, calcium, iron, sulfur.
Answer:
0-16
Explanation:
230 g of C2H5OH
560 g of C2H4
0.640 g of SO2
What is the total number of moles of C that must completely react to produce 2.0 moles of C2H6?
(1) 1.0 mol (3) 3.0 mol
(2) 2.0 mol (4) 4.0 mol
Answer: The correct answer is option 4.
Explanation:
According to the reaction, 1 mol of is obtained from 2 moles of C gives
Then, 2 moles of will be obtained from:
moles of C =4 moles
Hence, the correct answer is option 4.
Answer:
23.0733 L
Explanation:
The mass of hydrogen peroxide present in 125 g of 50% of hydrogen peroxide solution:
Mass = 62.5 g
Molar mass of = 34 g/mol
The formula for the calculation of moles is shown below:
Thus, moles are:
Consider the given reaction as:
2 moles of hydrogen peroxide decomposes to give 1 mole of oxygen gas.
Also,
1 mole of hydrogen peroxide decomposes to give 1/2 mole of oxygen gas.
So,
1.8382 moles of hydrogen peroxide decomposes to give
So,
Pressure = 746 / 760 atm = 0.9816 atm
Temperature = 27 °C
The conversion of T( °C) to T(K) is shown below:
T(K) = T( °C) + 273.15
So,
T₁ = (27 + 273.15) K = 300.15 K
Using ideal gas equation as:
PV=nRT
where,
P is the pressure
V is the volume
n is the number of moles
T is the temperature
R is Gas constant having value = 0.0821 L.atm/K.mol
Applying the equation as:
0.9816 atm × V = 0.9191 mol × 0.0821 L.atm/K.mol × 300.15 K
⇒V = 23.0733 L
According to zeroth law of thermodynamics, when two objects are kept in contact, heat (energy) is transferred from one to the other until they reach the same temperature (are in thermal equilibrium). When the objects are at the same temperature there is no heat transfer.
So, at equilibrium, =, +
q=m×c×T, where q = heat energy, m = mass of a substance, c = specific heat (units J/kg∙K), T is temperature
=(15X13X4.19)+(148X88.3X4.19)
= 81.37 ° C