C. Ta
Tantalum is an element with an atomic number of 63 and its electronic configuration is:
[Xe] 4f¹⁴ 5d³ 6s²
Answer:
By sharing their valence electrons, both hydrogen atoms now have two electrons in their respective valence shells. Because each valence shell is now filled, this arrangement is more stable than when the two atoms are separate.
Explanation:
Mercury-199 is composed of 80 protons, 119 neutrons, and 80 electrons.
Answer:
It is neither a synthesis reaction nor a decomposition reaction because two reactants form two products.
Explanation:
This reaction would be considered a single replacement reaction.
