1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
insens350 [35]
3 years ago
7

What did J.J. Thomson discover about the atom that changed the atomic model previously used?

Chemistry
1 answer:
galina1969 [7]3 years ago
7 0
J.J. Thomson hypothesized and discovered that the atom was not the smallest unit of matter but that instead there were much smaller units. He discovered "sub-atomic particles" which make up atoms. The sub-atomic particle that Thomson discovered was the electron. He discovered this through a process of experiments testing cathode rays.
You might be interested in
21. In infrared spectroscopy, absorption of electromagnetic radiation results in transitions between ________ energy levels.
Slav-nsk [51]

In infrared spectroscopy, absorption of electromagnetic radiation results in transitions between <u>Vibrational </u>energy levels.

<h3>What does spectroscopy mean?</h3>

Definition of spectroscopy Spectrum analysis is the study and measurement of the spectrum that matter emits when it interacts with electromagnetic (EM) radiation. It is the investigation of how frequency or wavelength affects the relationship between matter and radiation.

The various forms of spectroscopy include the following:

  • Acoustic resonance: A type of spectroscopy that primarily uses the ultrasonic and sonic ranges of sound. It is a popular, affordable approach for classifying and valuing materials.
  • X-ray photoelectron: This technique makes use of the diffraction patterns that X-rays produce as they travel through crystalline materials. The nature of the crystal structure can be inferred from these patterns.
  • You can use circular dichroism, a type of light absorption spectroscopy, to determine how differently a sample absorbs left- and right-circularly polarized light.
  • It is appropriate for exploring the electronic structure of molecules and detecting the compounds present. Ultraviolet-Visible (UV/Vis) Spectroscopy. It aids in the recognition of peptide bonds, coenzymes, side chains of amino acids, and prosthetic groups.
  • NMR Spectroscopy: This technique uses nuclear magnetic resonance to measure the magnetic fields surrounding the nuclei. Radio waves are used to excite atomic nuclei in a material.
  • Spectroscopy of the infrared range of the electromagnetic spectrum is known as infrared spectroscopy. Longer wavelengths and lower frequencies are found in infrared photons, and in infrared spectroscopy, the idea of absorption spectroscopy is used.
  • Raman spectroscopy is a method of spectroscopy used to examine low-frequency system modes such as rotational, vibrational, and other modes.

Learn more about Spectroscopy here:-

brainly.com/question/27610069

#SPJ4

5 0
2 years ago
What happens to valence electrons in metals?
Marrrta [24]
During a chemical reaction , the metal atom will donate its valence electrons to form a positively charged ion (cation) and also to attain the stable octet electron arrangement.
3 0
3 years ago
Why is it important to living things that water is bonded by h bond and not by covalent or ionic one
nexus9112 [7]
Because im pretty sure the molecules would just fall apart like salt which is ionic
8 0
3 years ago
What is an acid in chemistry?
Vikentia [17]
An acid in chemistry is anything with a pH level lower than 7.
5 0
3 years ago
Read 2 more answers
19. Which of the following statements is accurate? A. If an object is said to be decelerating, its velocity must be increasing.
Pepsi [2]
I would think it would be D because if the velocity can change and if that changes then its either acceleration or deceleration. depends on how it changes.

I hope that helps! :)
7 0
3 years ago
Read 2 more answers
Other questions:
  • Acid-Base tritration
    14·1 answer
  • Help please 2 mins til it submits
    5·1 answer
  • What does the velocity of a wave measure?
    9·2 answers
  • Which of the following aqueous solutions is the best conductor of energy
    14·1 answer
  • in the following balanced equation 2C2H6 + 7O2 --&gt; 4CO2 + 6H20 if 7.0 g of C2H6 react with 18g of O2, how many grams of water
    13·1 answer
  • Quick chemistry question (photo attached)
    13·1 answer
  • Which best describes a difference between prokaryotic and eukaryotic cells
    11·1 answer
  • How do atmospheric updrafts affect clouds?
    12·1 answer
  • Which statement describes the process of oxidation? (1 point)
    11·1 answer
  • Which of the following is pure compound?<br> Ethanol,petrol,steel ,tapwater
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!