Which of the following is not a one-electron atom
A) H
B) He+
C) Li2+
D) Be2+
E) O7+
I know that H, He+, Li2+ and Be3+ are. i can't seem to find out about Be2+ and O7+. How to I calculate it?
Ah, now we're getting into atomic fun! Let me entertain you with an answer.
So, let's break this down. A one-electron atom is an atom that has only one electron orbiting its nucleus. To figure out which of the options is not a one-electron atom, we have to look at the electron configuration.
H: Hydrogen has 1 electron, so it's a one-electron atom. Check!
He+: Helium with a +1 charge means it lost one electron, so it has one electron remaining. It's still a one-electron atom. Checkaroo!
Li2+: Now, this is where things get interesting. Lithium normally has 3 electrons, but here, it's Li2+, which means it lost two electrons. Hence, it is left with only one electron, making it a one-electron atom. Ding, ding, check!
Be2+: Ah, beryllium with a +2 charge. Beryllium usually has 4 electrons, but here, it lost two. So, Be2+ ends up with only 2 electrons, making it a two-electron atom. Boom, we found it! Be2+ is the odd one out!
O7+: Now, onto oxygen with a +7 charge. Oxygen normally has 8 electrons, but it lost 7 of 'em. Thus, O7+ ends up with only 1 electron, making it a one-electron atom. Check! O7+ isn't the answer.
Therefore, the answer is D) Be2+. It's the sneaky two-electron atom hiding amidst the one-electron atoms. Don't let it fool you!
Hope I tickled your atomic funny bone! Anything else I can assist you with?
To determine if Be2+ and O7+ are one-electron atoms, we need to consider their electronic configurations.
A one-electron atom has only one electron, so we need to find the number of electrons for each atom.
Starting with Be2+:
- Beryllium (Be) has an atomic number of 4, which means it normally has 4 electrons.
- Be2+ signifies that it has lost two electrons, so it will have a total of 2 electrons in the 1s orbital.
Since Be2+ has only 2 electrons, it is considered a one-electron atom.
Moving on to O7+:
- Oxygen (O) has an atomic number of 8, meaning it normally has 8 electrons.
- O7+ suggests it has lost seven electrons, so we need to calculate the number of remaining electrons.
Since O7+ has lost 7 electrons, it now has only 1 electron left. Therefore, O7+ can be considered a one-electron atom as well.
So the answer to the question is none of the options provided. Both Be2+ and O7+ are one-electron atoms.
To determine whether Be2+ and O7+ are one-electron atoms, you need to understand their electronic configurations and the concept of one-electron atoms.
A one-electron atom refers to an atom in which only one electron is present. The electronic configuration of an atom describes the arrangement of its electrons in specific energy levels or shells.
In the case of an atom, the number of electrons is equal to the atomic number of the element. However, for ions, such as Be2+ and O7+, you must consider the number of missing or additional electrons.
To determine the electronic configuration of an ion, you need to know the atomic number of the element and the charge of the ion. The atomic number represents the total number of protons (which is also equal to the number of electrons) in the atom.
For Be2+:
- The atomic number of beryllium (Be) is 4.
- Be2+ means that it has a +2 charge, indicating the loss of 2 electrons.
- Since Be has 4 electrons, losing 2 electrons results in 2 remaining electrons.
- Therefore, the electronic configuration of Be2+ is 1s^2, where '1s^2' represents the filled 1s orbital.
From this analysis, we can conclude that Be2+ is not a one-electron atom because it has two remaining electrons.
For O7+:
- The atomic number of oxygen (O) is 8.
- O7+ means that it has a +7 charge, indicating the loss of 7 electrons.
- Since O has 8 electrons, losing 7 electrons results in 1 remaining electron.
- Therefore, the electronic configuration of O7+ is 1s^2, where '1s^2' represents the filled 1s orbital.
From this analysis, we can conclude that O7+ is a one-electron atom because it has only one remaining electron.
In conclusion, the answer to your question is:
- Be2+ is not a one-electron atom.
- O7+ is a one-electron atom.
Remember, to determine the electronic configuration of ions, you need to consider the atomic number and the charge of the ion.