Rydberg formula is given by:
where, 
= Rydberg constant = 
= wavelength
and 
are the level of transitions.
Now, for = 2 and = 6
= 
= 
= 
= 
= 
= 
= 
Now, for = 2 and = 5
= 
= 
= 
= 
= 
= 
Now, for = 2 and = 4
= 
= 
= 
= 
= 
= 
Now, for = 2 and = 3
= 
= 
= 
= 
= 
= 
The ion is Al³⁺
mass number - number of neutrons= atomic number
27 - 14 = 13
Aluminum has an atomic number of 13, thus we know this is the metal in question. Also, because the aluminum has only 10 electrons, (3 less than a neutral atom of aluminum would have), its charge must be 3+
Answer:
dollars each person will receive.
Explanation:
Number of people in which 1 mole of pennies is distributed = 250 million =
250 million = 
persons
Number of pennies in 1 mole = 
Pennies per person:
1 penny = 0.01 $
dollars each person will receive.
Aluminum is one of the main factors that reduce plant growth in acid soils. Although it is generally harmful to plants in soils with a neutral medium, the concentration of positive aluminum ions in acid soils increases and malfunctions in root and function growth.
Most acid soils are saturated with aluminum rather than hydrogen ions. Soil acidity is the result of hydrolysis of aluminum compounds. This principle (lime correction) to determine the degree of base saturation in the soil has become the basis of the methods used in soil testing laboratories to determine the lime requirements for soil. Application of lime to soil reduces the toxicity of aluminum to plants. Note This connector loads slowly.
Adaptation of wheat to allow aluminum to be carried out is due to the fact that aluminum releases organic compounds that in turn combine with harmful aluminum cations. It is believed that sorghum has the same endurance. The first genes found to withstand aluminum were found in wheat. Aluminum sulphide bearing has been found to be governed by an individual gene, such as in wheat. This is not the case in all plants.
