Answer:
i am doing this in science also i would like to know if u know
Explanation:
Answer:
A planet's orbital speed changes, depending on how far it is from the Sun. The closer a planet is to the Sun, the stronger the Sun's gravitational pull on it, and the faster the planet moves. The farther it is from the Sun, the weaker the Sun's gravitational pull, and the slower it moves in its orbit.
Answer:
Zinc reacts with dilute sulphuric acid to produce hydrogen gas (H2) and zinc sulphate. This is an example of displacement reaction of a non-metal by a metal. ... ZnSO4 is different in chemical composition and chemical properties than Zn and H2SO4 so it is a chemical change.
Answer: The given transition metal ions in order of decreasing number of unpaired electrons are as follows.
Explanation:
In atomic orbitals, the distribution of electrons of an atom is called electronic configuration.
The electronic configuration in terms of noble gases for the given elements are as follows.
- Atomic number of Fe is 26.
![Fe^{3+} - [Ar] 3d^{5}](https://tex.z-dn.net/?f=Fe%5E%7B3%2B%7D%20-%20%5BAr%5D%203d%5E%7B5%7D)
So, there is only 1 unpaired electron present in 
.
- Atomic number of Mn is 25.
![Mn^{4+} - [Ar]3d^{3}](https://tex.z-dn.net/?f=Mn%5E%7B4%2B%7D%20-%20%5BAr%5D3d%5E%7B3%7D)
So, there are only 3 unpaired electrons present in 
.
- Atomic number of V is 23.
![V^{3+} - [Ar] 3d^{2}](https://tex.z-dn.net/?f=V%5E%7B3%2B%7D%20-%20%5BAr%5D%203d%5E%7B2%7D)
So, there are only 2 unpaired electrons present in 
.
- Atomic number of Ni is 28.
![Ni^{2+} - [Ar] 3d^{8}](https://tex.z-dn.net/?f=Ni%5E%7B2%2B%7D%20-%20%5BAr%5D%203d%5E%7B8%7D)
So, there will be 2 unpaired electrons present in 
.
- Atomic number of Cu is 29.
![Cu^{+} - [Ar] 3d^{10}](https://tex.z-dn.net/?f=Cu%5E%7B%2B%7D%20-%20%5BAr%5D%203d%5E%7B10%7D)
So, there is no unpaired electron present in 
.
Therefore, given transition metal ions in order of decreasing number of unpaired electrons are as follows.
Thus, we can conclude that given transition metal ions in order of decreasing number of unpaired electrons are as follows.
Generally speaking only certain molecules will dissolve in water to begin with. The old phrase "like dissolves like" or "birds of a feather flock together" is very true with respect to what degree solutes are soluble or miscible in different solvents. At very low concentrations, almost all molecules are somewhat soluble in all solvents. But by trend, ionic and polar solutes are more soluble in polar solvents and non-polar molecules are soluble in non-polar (mostly organic) solvents. The units of concentration we just discussed are used to describe the degree to which a solute is soluble in a solvent.
When you place a non-polar molecule in a polar solvent (like oil in water) the molecules try to minimize surface contact between them. (like you and a guy with a cold on an elevator). This is actually the basis for the cells in our bodies. The lipids (oily fatty acids) form our cell membranes so that their non-polar tails face inward away from the polar cytoplasm and the polar heads face towards the polar cytoplasm.
