How many electrons are there in the unipositive ion of Cs-136 (#55)? How many neutrons?
To find the number of electrons in the unipositive ion of Cs-136 (#55), we first need to determine the number of protons. The atomic number of cesium (Cs) is 55, which implies that it has 55 protons. In an unipositive ion, the number of electrons is reduced by 1, so the unipositive ion of Cs-136 will have:
Number of electrons = Number of protons - 1
= 55 - 1
= 54 electrons
Now, let's determine the number of neutrons. The atomic mass of Cs-136 is given as 136. Since the atomic mass of an atom is the sum of its protons and neutrons, we can find the number of neutrons by subtracting the number of protons (55) from the atomic mass:
Number of neutrons = Atomic mass - Number of protons
= 136 - 55
= 81 neutrons
Therefore, the unipositive ion of Cs-136 (#55) has 54 electrons and 81 neutrons.
To determine the number of electrons in the unipositive ion of Cs-136 (#55), we need to determine the electron configuration of the neutral cesium atom (#55) first.
The atomic number of an element represents the number of protons in its nucleus, which also determines the number of electrons in the neutral atom. In this case, Cs-136 has an atomic number of 55, which means it normally has 55 electrons.
However, a unipositive ion has lost one electron. So, to find the number of electrons in the Cs-136+ ion, subtract one from the original 55 electrons:
55 electrons - 1 electron = 54 electrons
Therefore, the Cs-136+ ion has 54 electrons.
Now, to determine the number of neutrons in Cs-136 (#55), we can subtract the atomic number (protons) from the mass number (protons + neutrons). In this case:
Mass number (Cs-136) = 136
Atomic number (Cs) = 55
Neutrons = Mass number - Atomic number
Neutrons = 136 - 55 = 81 neutrons
Hence, the Cs-136+ ion has 54 electrons and 81 neutrons.
The atomic number is the number of protons = number of electrons.
#protons + #neutrons = mass number = 136.