58.7 %
Please correct me if I’m wrong. :)
Answer:
a) 0.210 j
/k
b) 0.032 j/k
Explanation:
Find the attachment for solution
They become more stable because they achieve a full outer shell of valence electrons with the magic number of 8.
Answer:
Name, Thallium. Symbol, Tl. Atomic Number, 81. Atomic Mass, 204.3833 atomic mass units. Number of Protons, 81. Number of Neutrons, 123. Number of Electrons, 81 ... It has a metallic luster when it is first exposed to air but it tarnish quickly
Explanation:
Hope this helped :)
Mezoic era began 252m years ago and ended 6.6m years ago.
It was a time of geological and biological transition. During this era the continents began to drift to their present configuration.
3 of the largest mass extinction occurred at this era. One which include the dinosaurs.
I hope this helped. :)
