Answer :
The correct answer is : 
Electron Affinity :
It is defined as energy released or absorbed when an electrons is added to neutral isolated atom in gaseous state .
The first electron affinity is the energy absorbed or released when one electron is to outermost shell of a neutral atom .
The first electron affinity is generally negative , when electron is added to non metals . While when electron is added to metals , the electron affinity is positive.
More the negative electron affinity , more the atom has tendency to accept the electron .
For example : F(g) + e⁻ → F⁻(g) ΔH⁰ = - 328.0
- 328.0 represents first electron affinity of Fluorine atom .
First electron affinity for Calcium can be written as :
The symbol for Calcium in its ground state is Ca . Since the electron (e⁻) is added so it is written on left side or reaction . The calcium will accept the electron and will form a negative ion as Ca⁻ .
Hence the equation goes as
Answer:
The answer is B. The molecules of a solid are close to each other
Answer:
N = 603.32 × 10 ²⁰
Explanation:
Given data:
Wavelength of photon = 12.0 μm or 12 × 10 ⁻⁶ m
Energy = 1.0 KJ or 1000 j
Number of photons = ?
Solution:
Formula:
E = n . h . f
E = energy
N = number of photons
h = planck's constant
f = frequency
it is known that
f = c/λ
thus,
E = N . h . c / λ
Now we will put the values in formula.
1000 j = ( N. 6.63 × 10 ⁻³⁴ j.s × 3 × 10⁸ m/s ) / 12 × 10 ⁻⁶ m
N = 1000 j ×12 × 10 ⁻⁶ m / 6.63 × 10 ⁻³⁴ j.s × 3 × 10⁸ m/s
N = 12000 j × 10 ⁻⁶ m / 19.89 × 10 ⁻²⁶ j. m
N = 603.32 × 10 ²⁰
Answer:
The charge on H is partial positive and the charge on I is partial negative.
δ+H−Iδ−
The percent ionic character is 5.15 %.
Explanation:
The ionic compound is formed by the complete transfer of electron from one atom to another. The one atom thus carry the positive charge while the other which accept the electron became negative. like in case of NaCl .This have 100% ionic character.
In covalent bond, the bond is formed by the sharing of electron between two atoms. The one atom which greatly pull the electrons towards itself is became partial negative while the other became partial positive atom. In this way electronegativity difference is created. For example in HI bond hydrogen is partial positive and have 2.2 electronegativity while the electronegativity of iodine is 2.66.
Percent ionic character:
Formula:
%ionic character = [1- e∧-(0.25)(x)²] × 100
X= XA - XB
XA = higher electronegativity
XB = lower electronegativity
X = 2.66 - 2.2
X = 0.46
now we will determine the %ionic character.
%ionic character = [1- e∧-(0.25)(x)²] × 100
%ionic character = [1- e∧-(0.25)(0.46)²] × 100
%ionic character = [1- e∧-(0.25)(0.2116)] × 100
%ionic character = [1- e∧-(0.0529)] × 100
%ionic character = [1- 0.9485)] × 100
%ionic character = 0.0515 × 100
%ionic character = 5.15%
Actually, I think you meant :A path that electric current follows is a circuit..
Hope this answer helps!
