Bohr's model was known as the solar system model. This is because he envisioned electrons as orbiting the nucleus in circles, and the force that kept that together was electrostatic attraction. This is analogous to the solar system model, where planets orbit the sun in a manner (although not in a circle) controlled by gravity.
When the solution used begins to change color and stays the new color for at least 30 seconds we are able to tell that the solution has reached the end point of titration
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Answer:</h3>
The higher the hydronium ion concentration of a solution, the <u>lower</u> its pH.
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Explanation:</h3>
- The pH is the measure of acidity or alkalinity of a substance.
- We calculate pH by using;
pH = -log[H+]
- The lower the pH of a solution the more acidic it is and the higher the pH the more basic or alkaline it is.
- From this relationship, the higher the hydronium ions concentration of a solution the lower the pH and the more acidic a solution is.
For example,
Solution A with a [H₃O+] of 0.003 M will have a pH of
pH = -log 0.003 M
= 2.52
While, a solution B with a [H₃O+] of 0.025 M will have a pH of
pH = -log 0.25 M
= 1.60
Therefore, the higher the concentration of hydronium ion of a solution the lower its pH is.
Answer:
<span>D) combine light nuclei
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Explanation:
Fission and fusion both deal with the alteration of atoms in order to produce energy. However, they are actually opposite processes, this is because:
1- Fission occurs when an atomic nucleus is split/divided into two forming two atoms
2- Fusion occurs when two light atomic nuclei combine together to form a single atom.
Hope this helps :)