Answer:
Explanation:
mass of electron in amu = .000549
mass of electron = mass of proton
total mass of electron and proton = 2 x1.098 x 10⁻³ = 2.196 x 10⁻³ amu
1 amu = 931 x 10⁶ eV
2.196 X 10⁻³ amu = 2.196 x 931 x 10³ eV
= 2.044 X 10⁶ eV.
= 2044 X 10³ ev
So minimum energy required = 2044 x 10³ eV.
Wavelength of photon required = 12375/2044 x 10³ A
= 6.054 X 10⁻³A. =6.054 X 10⁻¹³ m
frequency of photon = 3 x 10⁸/6.054x 10⁻¹³
= .4955 x 10¹⁶Hz.
= 4.955 x 10¹⁵ Hz
The velocity of an object determines if it is moving. If the velocity is zero, it is not moving. If it has a positive velocity, then it is moving forward. If it has a negative velocity, then it is moving backwards.
Answer:
correct answer is option A and B are correct.(an electron groups consist of bonded pairs of electrons and Lone-pair electrons )
Explanation:
An electron group is a group of electrons. An electron groups consist of bonded pairs of electrons and Lone-pair electrons . Electron can have single bond, double bond or they can have triple bond.
Therefore both option A and B are correct.
They are both formed by deposited river sediment.
C) because a new substance is formed
B) not sure but might be because the chemical properties of the substance has changed
