Answer:
b. The positive charge of the protons in the nucleus equals the negative charge in the electron cloud.
Explanation:
The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.
Symbol= e⁻
Mass= 9.10938356×10⁻³¹ Kg
It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.
While neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.
Symbol of proton= P⁺
Symbol of neutron= n⁰
Mass of proton=1.672623×10⁻²⁷ Kg
Mass of neutron=1.674929×10⁻²⁷ Kg
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons and overall charge on atom is zero and it is said to be neutral. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.
For example
The carbon have six protons and six neutrons so its atomic mass is 12 amu and atomic number is six.
<span>Energy is absorbed and then released to form an emission line.
When electrons absorb energy they increase there energy level. This is only temporary and the excited electron then relaxes back down to its original energy level releasing energy.
The energy is released in form of EM radiation of a specific frequency depending on the element and how many energy levels the electron relaxes.
This forms an emission line.</span><span />
The order of increasing energy is red, yellow, and blue
In physics for a given wave function, the wavelength is defined as the distance between two consecutive points in the waveform. Light is considered a wave and a particle. White light can split into colors of different wavelengths.
The wavelength of visible light ranges from 300 to 700 nm comprising the color VIBGYOR. Wavelength is calculated by the formula velocity divided by the frequency.
If the frequency of the given form is high, then the energy is also high.
brainly.com/question/10750459
#SPJ4
Rank the following photons in terms of increasing energy: (a) blue (λ = 453 nm); (b) red (λ = 660 nm); (c) yellow (λ = 595 nm).
As the frequency is inversely proportional to the wavelength, the energy is also inversely proportional. A higher wavelength will have lower energy.
To know more about wavelength, visit
Explanation:
The net equation will be as follows.
So, we are required to find for this reaction.
Therefore, steps involved for the above process are as follows.
Step 1: Convert K from solid state to gaseous state
, = 89 kJ
Step 2: Ionization of gaseous K
, = 418 KJ
Step 3: Dissociation of gas into chlorine atom
.
, = 122 KJ
Step 4: Iozination of chlorine atom.
, = -349 KJ
Step 5: Add ion and ion formed above to get KCl
.
, = -717 KJ
Now, using Born-Haber cycle, value of enthalpy of the formation is calculated as follows.
= 89 + 418 + 122 - 349 - 717
= - 437 KJ/mol
Thus, we can conclude that the heat of formation of KCl is - 437 KJ/mol.
Answer:
Options: 1, 2, 3 and 5 are correct
Explanation:
- As per the Aufbau priciple, electrons go into the subshell having the most minimal conceivable energy.
- By Hund's standard, the electron arrangement of carbon, which is , in this manner the carbon particle contains two unpaired electrons.
- Electrons can never have parallel turn in s-orbitals. If there should be an occurrence of Helium, it has 2 electrons with parallel turn in its 1s orbital.
- The plan of the orbitals in a multi electron molecule is not quite the same as the course of action in a solitary electron particle inferable from the electron-electron shocks in a multi electron iota.
- In the Li particle, the 3s, 3p, and 3d orbitals have various energies.
- Helium has 2 electrons during the 1s orbital and none during the 2s.