Answer:
I am not 100% sure but I think it is 26.981538
Explanation:
Answer:
The correct option is;
(B) 1 s², 2s², 2p⁶, 3s², 3p³
Explanation:
The electron configuration is the outline of the electron arrangement about a nucleus
In the systemic pattern of electron arrangement within an atom, there are, s, p, d, f orbitals
The maximum number of electrons in an s, p and d orbital = 2, 6, and 10 respectively
Based on Aufbau's principle the electrons are arranged based on the order of their energy level
The charge is presented by the number of electrons in the outermost shell, an element able to form an ion of charge of -3 will gain 3 electrons to complete its outermost shell
Among the options given, option B is the only option that has the capacity to take the electrons to complete the number of electrons in the p orbital outermost shell to 6 from 3, that is 3p³ + 3e⁻→ 3p⁶.
Answer:- The average atomic mass or the atomic mass of the element is 69.7230 amu.
Solution:- The atomic mass or also known as average atomic mass of an element is calculated from it's isotopes by using the formula:
average atomic mass = mass of First isotope(abundance) + mass of second isotope(abundance)
From given data, the mass of first isotope is 68.9255 amu and mass of second isotope is 70.9247 amu. percent abundance for the first isotope is 60.11%. The sum of percent abundance of all the isotopes of an element is always 100. So, the percent abundance of second isotope = 100 - 60.11 = 39.89%
We convert the percent abundances to the decimals and then plug in the values in the formula to calculate the average atomic mass.
First isotope abundance = 0.6011
second isotope abundance = 0.3989
average atomic mass = 68.9255(0.6011) + 70.9247(0.3989)
average atomic mass = 41.4311 + 28.2919
average atomic mass = 69.7230 amu
So, the average atomic mass or the atomic mass of the element is 69.7230 amu.
<span>The idea that all matter is made up of tiny, indivisible particles, or atoms, is believed to have originated with the Greek philosopher Leucippus of Miletus and his student Democritus of Abdera in the 5th century B.C. (The word atom comes from the Greek word atomos, which means “indivisible.”)</span>
