Answer
The elements in increasing order of atomic radius: oxygen, carbon, aluminum, potassium
Explanation:
The distance from the center of the nucleus to the outermost shell of the electron is known as the atomic radius of an element. The atomic radius decreases rightward along each period (row) of the table due to the increase in effective nuclear charge (the charge of the nucleus equal to the number of protons). Across a period, electrons are added to the same energy level and the increasing number of protons causes the nucleus to exert more pull on these electrons, which makes the atomic radius smaller. Atomic radius increases down each group (column) of the periodic table because of the addition of electrons to higher energy levels, which are further away from the nucleus and the pull of nucleus weakens. Another reason for the increase in atomic radius is the electron shielding effect, which is the reduction of the attractive force between a nucleus and its outer electrons due to the blocking effect of inner electrons
While moving from left to right in the second period, c arbon comes before oxygen and so oxygen will have a smaller atomic radius than carbon. While moving down the periodic table, al uminum comes before potassium even if they are not in the same period. So aluminum 's atomic radius will be smaller than that of potassium but bigger than that of carbon and oxygen.
(hope that helps can i plz have brainlist it will make my day :D hehe)
Explanation:
In order to calculate the molarity of a solution, you need to know two things
the number of moles of solute present in solution
the total volume of the solution
The problem provides you with a
24.7-g
sample of potassium chloride,
KCl
, and a total volume of a solution of
500. mL
.
In order to find the number of moles of potassium chloride, your solute, use the compound's molar mass, which as you know tells you the mass of one mole of potassium chloride
Answer:
Explanation:
Hello,
In this case, for the given chemical reaction:
The standard entropy change is computed by subtracting the products standard enthalpy and the reactants standard enthalpy considering each species stoichiometric coefficients:
Best regards.
Answer: How to calculate the mass percent by using these instructions
1.The molar mass is the mass of a given chemical element or chemical compound (g) divided by the amount of substance (mol).
2.The molar mass of a compound can be calculated by adding the standard atomic masses (in g/mol) of the constituent atoms.
Explanation:
