Abraham and isaac??um just two guesses of mine.
Atom/ion Electron Proton Neutron
Al 13. 13. 14.
Fe 26. 26. 30.
Cu 29. 29. 35
Mg 12. 12. 12.
La 57. 57. 82
Pb 82. 82. 126.
Ar 18. 18. 22
Ne 10. 10. 10.
Sr 38. 38. 52
Br. 35. 35. 44
Answer:
The beginning of the Precambrian period starts with the formation of Earth about 4.5 billion years ago and ends at the first sign of complex life about 540 million years ago. Though the Precambrian Period is often referred to as a period, it's actually the only supereon, which means that it spans multiple eons.
Explanation:
Answer:
As a result, the political-ideological heritage of the boom has been extremely his career as a literary young Turk closely identified with the Cuban Revolution). As Antonio Cornejo Polar has observed, the boom responded with variable and coincided with a structural crisis of the regional political and economic system
Explanation:
