(4) 220Fr, known as Francium-220, undergoes alpha decay, which emits an alpha particle, also known as a helium nucleus, which has a charge of +2.
Answer may be 1 co2 I might be wrong sorry
2. Left to right (smallest to largest) F-, Mg2+, Na+, and K+
5. Cs, Ga, As, N, O
6. Cs or H (probably cesium)
7. In or In 2+ (not sure which)
Hope this helps, I've never really seen questions like this before.
Question
Which one is more dangerous Ac or Dc how is it?
Answer
AC
_________________
AC has the voltage alternates, it enter and exit from your body without a closed loop.
