<span>I'm pretty sure it because of chemical change. :) Hope this helps!</span>
The group of archaea that are chemoautotrophic anaerobes that use hydrogen as an electron donor and sulfur compounds as terminal electron acceptors are the
Thermoacidophiles.
<h3>What are chemoautotrophic anaerobes?</h3>
The chemoautotrophic anaerobes are those organisms that derive energy for survival through the reduction of the following compounds:
Thermoacidophiles is a typical example of the group of archaea that are chemoautotrophic anaerobes that use hydrogen as an electron donor and sulfur compounds as terminal electron acceptors.
Learn more about anaerobes here:
brainly.com/question/16188326
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Answer: X2Y3
Explanation: I had the same question ;) (and got it right)
Answer:
Arrow A:
✔ 74.6 kJ
Arrow B:
✔ exothermic
Arrow C:
✔ has a magnitude that is less than that of B
Arrow D:
✔ represents the overall enthalpy of reaction
Explanation:
<h3>Further explanation</h3>
In the periodic system
The group number in the periodic system is determined by the same valence electrons (main group), while the period is determined by the number of shells
valence electrons :
- Transition metals: ns, (n-1) d, np
- Lanthanides and actinides: ns, (n-2) f, (n-1) d, np
Valence electrons for the main group: Group 1,2,13-18
Lanthanides and actinides: Group 3–16
Transition metals: Group 3–12
1. Valence electron : 4s²
Group 2
Period 4
2. Valence electron : 2s²2p²
Group 14
Period 2
3. Valence electron : 3s²3p⁴
Group 16
Period 3
4. Valence electron : 4s²3d⁸
Group 10
Period 4
5. Valence electron : 5s²5p⁶
Group 18
Period 5
6. Valence electron : 7s²
Group Lanthanides and actinides (6)
Period 7
