Question

periodic table basics practice
choose all that apply to plutonium
□ transition metal
□ group 9
□ 7 electron energy level
□ period 6
□ member of the actinide series
□ member of the lanthanide series
□ same period as seaborgium
□ same group as cobalt
□ unstable

Explanation:

• Transition Metal: Plutonium is a transition metal (actinide, a type of transition metal).
• Group 9: No, plutonium is in actinide series, not Group 9.
• 7 electron energy level: No, plutonium has 7 energy levels? Wait, no, atomic number 94, electron config: [Rn] 5f⁶ 7s²? Wait, no, energy levels: period 7? Wait, correction: Plutonium (Pu) has atomic number 94. Electron configuration: [Rn] 5f⁶ 7s²? Wait, no, period is 7? Wait, no, actinides are in period 7? Wait, no, lanthanides and actinides: lanthanides period 6, actinides period 7? Wait, no, actually, actinides are in period 7 (atomic numbers 89 - 103). So Pu (94) is period 7. So 7 electron energy levels? Wait, electron shells: n = 1 to 7? Wait, Pu's electron shells: 2, 8, 18, 32, 24, 8, 2. So 7 shells (energy levels). So "7 electron energy level" is correct? Wait, no, "7 electron energy level" – maybe meaning the outermost? No, the number of energy levels is the period. So period 7 means 7 energy levels. So that's correct.
• Period 6: No, actinides are period 7.
• Member of the actinide series: Yes, Pu is in actinide series (89 - 103).
• Member of the lanthanide series: No, lanthanides are 57 - 71.
• Same period as seaborgium: Seaborgium (Sg) is atomic number 106, period 7. Pu is period 7, so yes.
• Same group as cobalt: Cobalt is Group 9, Pu is actinide, not Group 9.
• Unstable: Pu is radioactive and unstable.

So correct options: Transition Metal, 7 electron energy level, Member of the actinide series, Same period as seaborgium, Unstable. Wait, wait, let's recheck:

• Transition Metal: Actinides are considered inner transition metals (a subset of transition metals), so yes.
• 7 electron energy level: Period 7, so 7 energy levels (shells), correct.
• Member of the actinide series: Yes.
• Same period as seaborgium: Seaborgium is period 7, Pu is period 7, yes.
• Unstable: Yes, radioactive.

Wait, earlier mistake: period of Pu – actinides are in period 7 (atomic numbers 89 - 103), so Pu (94) is period 7. So "Period 6" is wrong, "7 electron energy level" (since period 7 means 7 energy levels) is correct. "Same period as seaborgium" – seaborgium is period 7, so yes.

So correct checkboxes: Transition Metal, 7 electron energy level, Member of the actinide series, Same period as seaborgium, Unstable. Also, wait, is Pu a transition metal? Actinides are inner transition metals, which are part of the transition metals (d - block and f - block). So yes, transition metal.

Wait, let's confirm each:

1. Transition Metal: Yes (actinides are inner transition metals, a type of transition metal).
2. Group 9: No (cobalt is Group 9, Pu is actinide).
3. 7 electron energy level: Yes (period 7, so 7 energy levels).
4. Period 6: No (period 7).
5. Member of the actinide series: Yes (89 - 103, Pu is 94).
6. Member of the lanthanide series: No (57 - 71).
7. Same period as seaborgium: Seaborgium (Sg) is period 7, Pu is period 7: Yes.
8. Same group as cobalt: Cobalt is Group 9, Pu is actinide: No.
9. Unstable: Yes (radioactive, decays).

So the correct options are: Transition Metal, 7 electron energy level, Member of the actinide series, Same period as seaborgium, Unstable.

Answer:

• Transition Metal (checked)
• 7 electron energy level (checked)
• Member of the actinide series (checked)
• Same period as seaborgium (checked)
• Unstable (checked)

(The other options: Group 9, Period 6, Member of the lanthanide series, Same group as cobalt are unchecked.)