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
Elodia [21]
2 years ago
7

Protons and neutrons are composed of what? A electrons B.quarks C.ions D.molecules

Chemistry
2 answers:
leonid [27]2 years ago
6 0
B. Quarks is the answer.
drek231 [11]2 years ago
3 0
Protons and neutrons are made up of quarks. 

B.
You might be interested in
How do you slow down the motion of a gas particle?
jasenka [17]
I think u turn down the heat not to sure
3 0
3 years ago
Read 2 more answers
Which of the following would naturally form a cation?<br> Ne<br><br> Li<br><br> O<br><br> I
Lina20 [59]
Metals naturally form cations.
4 0
2 years ago
How many photons are produced in a laser pulse of 0.497 J at 469 nm?
dimulka [17.4K]
<span>E=hν</span> where E is the energy of a single photon, and ν is the frequency of a single photon. We recall that a photon traveling at the speed of light c and a frequency ν will have a wavelength λ given by <span>λ=<span>cν</span></span>λ will have an energy given by <span>E=<span><span>hc</span>λ</span></span><span>λ=657</span> nm. This will be <span>E=<span><span>(6.626×<span>10<span>−34</span></span>)(2.998×<span>108</span>)</span><span>(657×<span>10<span>−9</span></span>)</span></span>=3.0235×<span>10<span>−19</span></span>J</span> So we now know the energy of one photon of wavelength 657 nm. To find out how many photons are in a laser pulse of 0.363 Joules, we simply divide the pulse energy by the photon energy or <span>N=<span><span>E<span>pulse </span></span><span>E<span>photon</span></span></span>=<span>0.363<span>3.0235×<span>10<span>−19</span></span></span></span>=1.2×<span>1018</span></span>So there would be <span>1.2×<span>1018</span></span><span> photons of wavelength 657 nm in a pulse of laser light of energy 0.363 Joules.</span>
7 0
2 years ago
Read 2 more answers
Carbon burns in the presence of oxygen to give carbon dioxide. Which chemical equation describes this reaction?
Phoenix [80]

Answer: Option (B) is the correct answer.

Explanation:

It is known that for writing a chemical reaction equation, reactants are written on left hand side whereas products are written on right hand side.

And in between reactants and products a forward arrow is placed pointing towards the products.

Therefore, the reaction for carbon burns in the presence of oxygen to give carbon dioxide will be written as follows.

          Carbon + Oxygen \rightarrow Carbon dioxide

Here, carbon and oxygen atoms are the reactants whereas carbon dioxide is the product.

6 0
3 years ago
What is the overall charge of an atom? Explain why
Zepler [3.9K]

Answer:

atoms have no overall charge. this is because they contain equal numbers of positive protons and negative electrons

4 0
2 years ago
Other questions:
  • What is the most likely evidence of an energy transformation taking place when a skater glides over ice? A.Skating blades become
    14·1 answer
  • Would it make a difference if calcium bromide solution, cabr2, were used rather than sodium bromide solution?
    11·1 answer
  • Why is reactivity not a physical property
    10·1 answer
  • Where is the genetic code located again in the dna molecule again?
    11·1 answer
  • A bird building a nest for its young is a reproductive strategy. Based on this example, what do you think the term “reproductive
    6·2 answers
  • HELP ME PLEASE
    10·2 answers
  • Plzz help
    10·1 answer
  • WILL GIVE BRAINLIEST NO FAKE ANSWERS PLEASE!
    13·2 answers
  • A scientist is working in a lab and accidentally combines two liquids that quickly form a solution. Which process could be used
    9·1 answer
  • Hemoglobin has a much greater affinity for carbon monoxide than oxygen. which principle explains why a hyperbaric chamber (conta
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!