Hey there!
1 mole has 6.022 x 10²³ atoms.
Multiply that by 3.2 because we have 3.2 moles.
3.2 x 6.022 x 10²³
1.9 x 10²⁴
There are 1.9 x 10²⁴ atoms in 3.2 moles of chromium.
Hope this helps!
Answer: As the atomic radii increases, the ionization energy decreases.
Explanation: Atomic Radii is the distance between the centre of the nucleus/atom and the outermost shell, while the ionization energy is the minimum energy required to remove the most loosely bound electron/valence electron from an isolated neutral gaseous atom/molecule.
As the number of shells increases, the atomic radius of an atom logically increases, and the force of attraction between the relatively positively charged heavy nucleus (positively charged because it contains protons and heavy because the protons & neutrons have great masses relative to the mass of an electron) and the electrons on the outermost shell reduces because of the increasing distance between this two entities. The reduction in the forces of attraction, makes it easier to remove that valence electron on the outermost shell as the size increases. This is why the ionization energy decreases with increase in atomic radius thereby leading to a decrease in ionization energy as we move down the group (of a periodic table).
Across the period (left to right), elements in the same period have the same number of shells, but the electrons in the outermost shell increases as we go from left to right, leading to a tighter hold on the increasing electrons by the nucleus. This is why atomic radius decreases & ionization energy consequently increase across a period.
More energy is required to remove the valence electrons as the force of attraction between nucleus & valence electrons on the outermost shell increases.
Answer:
unsaturated solution
Explanation:
Given: Epsom salts have a solubility 26.2 grams.
By definition,Solubility is the maximum amount of solute that can be dissolved in 100 g of water.
A solution is called saturated solution when the concentration of solute becomes equal to its solubility.
If the concentration of solute is less than solubility it is called unsaturated solution.
In this case: solubility is 26.2 grams.
If we dissolve 26 grams of Epsom salt in 100 g of water , concentration of solute is less than the solubility(26.2 g in 100 g of water) , hence it is an unsaturated solution.
Answer and Explanation:
Polar compounds are those that have an unequal sharing of electrons, causing one end to be more positively or negatively charged than the other end.
Ionic compounds are those that are made up of a positive ion and a negative ion. Clearly, we can see that if one ion is positive and the other is negative, then that would make one end of the compound more or less positively charged than the other end, which is exactly the definition of a polar compound.
That is why ionic compounds are always polar.