3. What happens to the change on individual ions when they form ions?
11. Write the names of the two ions in each of the following compounds.
(C) Na2O
(E) Na3PO4
(G) NH4OH
(H) Ca (NO3)2
8. Use the tables of metals, non-metals, and polyatomic ions and the Periodic table to name the following ionic compounds.
(E) Mg3N2
(F) Fe2(CO3)3
(G) Cr2O3
(H) Al2(SO4)3
(I) Cu2SO4
(J) Pb(NO3)4
I do not understand these questions, even though I have read over the material lots of times. I struggle in chemistry. :(
Thanks for your time and help
I'm sorry to hear that you're struggling with chemistry, but I'll do my best to explain these concepts to you. Let's start with your first question:
3. What happens to the charge on individual ions when they form ions?
When individual atoms gain or lose electrons, they form ions. The number of electrons gained or lost determines the charge on the ion. If an atom loses electrons, it becomes positively charged, and if it gains electrons, it becomes negatively charged.
For example, let's consider sodium (Na), which has 11 protons and 11 electrons in its neutral state. When sodium forms an ion, it loses one electron, resulting in a positive charge. So, the ion formed is Na+.
On the other hand, chlorine (Cl) has 17 protons and 17 electrons in its neutral state. When chlorine forms an ion, it gains one electron, resulting in a negative charge. So, the ion formed is Cl-.
In summary, when atoms form ions, they either gain or lose electrons, which changes their charge.
Now, let's move on to your second question:
11. Write the names of the two ions in each of the following compounds.
(C) Na2O: In this compound, the sodium ion (Na+) and the oxide ion (O2-) are present. So, the names of the ions are sodium and oxide.
(E) Na3PO4: In this compound, the sodium ion (Na+) and the phosphate ion (PO43-) are present. So, the names of the ions are sodium and phosphate.
(G) NH4OH: In this compound, the ammonium ion (NH4+) and the hydroxide ion (OH-) are present. So, the names of the ions are ammonium and hydroxide.
(H) Ca(NO3)2: In this compound, the calcium ion (Ca2+) and the nitrate ion (NO3-) are present. So, the names of the ions are calcium and nitrate.
To understand the names of the ions in compounds, you can refer to the Periodic Table for the charges of individual elements and the table of polyatomic ions for common groups of atoms that carry specific charges.
I hope this explanation helps you understand the concepts better. Don't hesitate to ask if you have any further questions.