1a) anion and S-2
1b) cation and Al+3
1c) anion and N-3
1d) cation and Ca+2
Their dark matter detector witnessed the rarest event ever recorded: the radioactive decay of xenon-124. ... The supreme fine-tuning and clean measurements allowed by XENON1T enabled scientists to witness xenon-124 decay away at a rate that far exceeds the life of the universe.
Hope that helps.
the mass number of fluorine (F) is 19
C. 19
the bond in a molecule of Cl2 is a covalent bond
Electrons are extremely small. Atoms are comprised mostly of empty space. Protons have a positive charge.
Hope this helps.
