fill in the missing information: symbol atom or ion? check all that apply number of protons number of…
fill in the missing information: symbol atom or ion? check all that apply number of protons number of electrons o²⁻ neutral atom cation anion 29 29 neutral atom cation anion 41 39
Answer
Explanation:
Step1: Analyze $O^{2 -}$
The atomic number of oxygen (O) is 8, so the number of protons is 8. Since it is an anion with a - 2 charge, the number of electrons is $8 + 2=10$.
Step2: Analyze the second row
If the number of protons is 29, the element is copper (Cu). Since the number of protons equals the number of electrons (29), it is a neutral atom, and the symbol is Cu.
Step3: Analyze the third row
If the number of protons is 41, the element is niobium (Nb). Since there are 41 protons and 39 electrons, it has a + 2 charge, so it is a cation. The symbol is $Nb^{2+}$.
Answer:
| symbol | atom or ion? check all that apply | number of protons | number of electrons |
|---|---|---|---|
| $O^{2 -}$ | anion | 8 | 10 |
| Cu | neutral atom | 29 | 29 |
| $Nb^{2+}$ | cation | 41 | 39 |