So I would like to check some of my answers. I really appreciate any help
1. Which of the following atoms or ions is diamagnetic; Cr Br Mn2+ B C4+ - I said C4+
2. Which of the following atoms or ions is paramagnetic?
C4- S^4+ V^4+ Se2- Ge4+I said V^4+
3.Which one of the following elements has a +2 ion with 3 unpaired electrons?
Mg S V Se Mn- I said V
4.Use periodic trends and predict which of the following elements has the largest first ionization
energy.
Sr Cl Cs Br; I said Cl
5.Use periodic trends and predict which of the following elements has the smallest atomic radius.
Ar Sr Al Ne- I said Ne
6.Use periodic trends and predict which of the following ions has the largest radius.
O2-
N3-
Al3+
Mg2+; I got Mg^2+
7.Use the noble-gas notation and write the ground-state electronic configurations of the following ions:
(a) N3- (b) Tl3+ (c) Fe3+; a)(Ne) b) (Xe)4f155d10 c)(Ar)3d5
Each of the following oxides reacts with water to produce an acid or a base, depending on whether
the oxide is an acidic or a basic oxide. Give the formula of the product of this reaction.
(a) Cl2O7 (I got HCLO4) (b) Rb2O (RbOH) (c) SO3 (H2SO4)
I would be really grateful if you could verify please! You do not need to confirm all of them, even a small amount would be helpful!
Sure, I can help you verify your answers. Let's go through each question one by one:
1. Which of the following atoms or ions is diamagnetic; Cr, Br, Mn2+, B, C4+? You chose C4+.
- To determine if an atom or ion is diamagnetic, we need to look at its electron configuration. Diamagnetic species have all their electrons paired.
- The electron configuration of C4+ is 1s2 2s2 2p2. All the electrons are paired, so C4+ is diamagnetic. That is correct!
2. Which of the following atoms or ions is paramagnetic? C4-, S^4+, V^4+, Se2-, Ge4+? You chose V^4+.
- To determine if an atom or ion is paramagnetic, we need to look at its electron configuration. Paramagnetic species have unpaired electrons.
- The electron configuration of V^4+ is [Ar]3d1. It has one unpaired electron, so V^4+ is paramagnetic. That is correct!
3. Which one of the following elements has a +2 ion with 3 unpaired electrons? Mg, S, V, Se, Mn? You chose V.
- To determine the number of unpaired electrons in a +2 ion, we need to look at its electron configuration.
- The electron configuration of V^2+ is [Ar]3d3. It has 3 unpaired electrons, so V^2+ is the correct answer!
4. Use periodic trends and predict which of the following elements has the largest first ionization energy. Sr, Cl, Cs, Br? You chose Cl.
- Ionization energy increases from left to right across a period and decreases from top to bottom in a group.
- Among the given elements, Cl is in the upper right corner of the periodic table, so it has the largest first ionization energy. That is correct!
5. Use periodic trends and predict which of the following elements has the smallest atomic radius. Ar, Sr, Al, Ne? You chose Ne.
- Atomic radius increases from right to left across a period and from top to bottom in a group.
- Among the given elements, Ne is the smallest as it is the furthest to the right of the periodic table. That is correct!
6. Use periodic trends and predict which of the following ions has the largest radius. O2-, N3-, Al3+, Mg2+? You chose Mg^2+.
- When comparing ions with the same electronic configuration, the ion with the more positive charge will have a smaller radius.
- Among the given ions, Mg^2+ has a smaller radius than Al^3+ because it has a higher positive charge. Therefore, Al^3+ has the largest radius. That is incorrect. The correct answer is Al^3+.
7. Use the noble-gas notation and write the ground-state electronic configurations of the following ions: (a) N3- (b) Tl3+ (c) Fe3+? You provided the following answers: (a) (Ne) (b) (Xe)4f155d10 (c) (Ar)3d5.
- The noble-gas notation is used to simplify the electron configuration by using the symbol of the noble gas that precedes the element.
- (a) The electron configuration of N3- is (Ne). That is correct!
- (b) The electron configuration of Tl3+ is (Xe)4f145d9. That is incorrect. The correct answer is (Xe)4f145d8.
- (c) The electron configuration of Fe3+ is (Ar)3d5. That is correct!
Now, let's take a look at the last part where you provided the products of reactions:
(a) Cl2O7 reacts with water to produce HClO4. That is correct!
(b) Rb2O reacts with water to produce RbOH. That is correct!
(c) SO3 reacts with water to produce H2SO4. That is correct!
Overall, you did a great job! Most of your answers are correct, and you have a good understanding of periodic trends and electron configurations. However, you made a mistake in question 6 regarding the ion with the largest radius. Keep up the good work!