The plausible reason for the change in mineral A will be the lower activation energy than the transferred energy.
The addition of energy will result in the change in the minerals if the activation energy is exceeded.
The minerals found in mining A and B have transferred the energy. The minimum amount of energy required to do the transition in the atoms in the activation energy.
The possible reason for the change in the mineral A will be the lower activation energy for the mineral A. The mineral B does not change because the activation energy of mineral B is higher as compared to mineral A.
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Answer: Mineral A changed because Molecular energy transferred is equal or greater than than its Activation energy
Mineral B didn't change because Molecular energy transferred is less than its Activation energy.
Explanation:
The molecules of Mineral A has been disturbed by the addition of energy causing a change and the entropy is increased. The Molecules of Mineral B has not been disturbed because the residual energy has not been overcome and therefore yielding no visible change
b)They have different numbers of neutrons and different charges.
c)They have different numbers of protons and different mass numbers.
d)They have different numbers of neutrons and different mass numbers.
Boron occurs naturally as two isotopes that is they have the same number of protons and different numbers of neutrons with different atomic charges. Option D is correct.
These are the variations of elements having the same number of protons and electrons and different numbers of neutrons. As they are neutral in charge and their mass is totally negligible as compared to the mass of proton as they both are located at the center of the atom
The center of the atom is the nucleusas there are some more species of element isobars isotones isoelectronic. Isobars are those species that have the same neutronic numbers with different photonic and electronic numbers
The isotopes of boron are boron10, boron12, boron14, etc. .Carbon is another compound that is having 3 isotopes carbon12 carbon13, and caobon14. But mostly their properties are the same with a little difference between them
Therefore, the correct option is D.
Learn more about isotopes, here:
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The process melts an ore to separate useful metals from the rest of the elements in the ore is called smelting. The ore is heated beyond its melting point to extract the metal with the help of oxidizing agents such as air or reducing agents such as coke.
If a sample of iron with a density of 7.80 g/cm^3 displaces 75.0 mL of water when placed in a beaker, its mass is 585 g.
Answer:
The Plum Pudding Model and the Nuclear Atomic Model were early atomic models that helped explain the structure of an atom. Here are sketches and key points associated with each model:
**Plum Pudding Model:**
**Key Points:**
1. Proposed by J.J. Thomson in 1904.
2. The atom is considered a positively charged sphere.
3. Electrons (negatively charged particles) are embedded randomly throughout the positively charged sphere.
4. This model suggested that the atom is mostly empty space.
**Nuclear Atomic Model:**
**Key Points:**
1. Proposed by Ernest Rutherford in 1911.
2. The atom consists of a tiny, dense, positively charged nucleus at the center.
3. Electrons orbit the nucleus in specific energy levels or shells.
4. Most of the atom's mass is concentrated in the nucleus.
5. The nucleus is surrounded by a vast amount of empty space.
Here are simplified sketches of these two atomic models:
**Plum Pudding Model:**
```
O
/ \
/ \
/ \
/ \
+ + + + + + + + +
(Positively Charged Sphere)
```
In this sketch, the "+" symbols represent the positive charges distributed throughout the sphere, while the "O" symbols represent the negatively charged electrons scattered throughout.
**Nuclear Atomic Model:**
```
Nucleus (+)
/ | \
/ | \
/ | \
- - - - - - - - - - - - - - -
| | |
| Electron | Electron |
| Orbit | Orbit |
| (e-) | (e-) |
```
In this sketch, the nucleus at the center contains positively charged protons and neutrons (not shown). Electrons are shown orbiting the nucleus in discrete energy levels or shells.
These models played a crucial role in understanding atomic structure, but they were later refined and replaced by the modern quantum mechanical model, which provides a more accurate description of how electrons behave within the atom.
Explanation:
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