28 August, 04:14
How many electrons are needed in the outer energy levels of most atoms for the atom to be chemically stable?
28 August, 06:12
Answer: eight (8), for most atoms.
Atoms gain chemical stability by completing the highest energy level with all the electrons it can have, which is 8 for most atoms.
The elements of the first period (row 1), hydrogen and helium, have outer energy level, n, equal to 1.
So, since n = 1, the atoms of hydrogen and helium (in the ground state) fill the 1s orbital, so they need just two electrons to be chemically stable. That is why helium, having 2 electrons, is a noble gas, and hydrogen, having 1 electron, just needs to add 1 more electron to be chemically stable like helium.
For period 2 through 7 of the periodic table (n = 2, n=3, n = 4, n = 5, n = 6, and n = 7), the outer energy levels can hold 8 electrons. That is why the noble gases Ne, Ar, Kr, Xe, Rn, and Og, each with 8 electrons in the outer energy level are chemically stable.
Here you have two examples to see how this works:
Fluoride, F, has atomic number 9, so it has 9 electrons, two of them are in the energy level 1 and seven are in the energy level 2. Hence, F needs to gain 1 electron to complete 8 and be chemically stable.
Sulfur, S, has atomic numberr 16. It has 16 electrons, six of them are in the outer energy level (level 3), and it needs to gain 2 electrons to complete 8 and be chemically stable.
Know the Answer?
New Questions in Chemistry
Which are ways that humans can lower biodiversity as they use the environment? CHECK ALL THAT APPLY
The opera station broadcasts at 90.5 MHz and the rock nroll station at 07.1 MHz which station's signal has waves with longer wavelengths and which one has higher energy
Solve 3 q - 5 = 13 for q. q =
Beth files a suit against Cruise Line, Inc. Cruise responds that it appears from the pleadings that the parties do not dispute the facts and the only question is how the law applies to those facts.
Which of the following was best compares an armistice to a peace treaty
Aqueous hydrochloric acid will react with solid sodium hydroxide to produce aqueous sodium chloride and liquid water. Suppose 34. g of hydrochloric acid is mixed with 9.30 g of sodium hydroxide.
How did the colonist use it to get more support for their rebellion
Is 7/8 greater than 3/4
What is the molar mass of C2H6O
True Flight Golf manufacturers a popular shaft for golf clubs. Its trade secret is a unique process for weaving high-tension wire into the center of the shaft such that energy is accumulated during the swing and released at impact.
» How many electrons are needed in the outer energy levels of most atoms for the atom to be chemically stable?