Positrons are spontaneously emitted from the nuclei of potassium -37.
Answer: heck the chemistry app itll help you i dont know this answer but the app will tell u!
Chlorine + Calcium --> Ionic Bond
Iron cannot covalently bond as it is a metal
Answer: The volume of 0.684 mol of carbon dioxide at s.t.p. is 15.3 L
Explanation:
According to ideal gas equation:

P = pressure of gas = 1 atm (at STP)
V = Volume of gas = ?
n = number of moles = 0.684
R = gas constant = 
T =temperature =
(at STP)



Thus the volume of 0.684 mol of carbon dioxide at s.t.p. is 15.3 L
Answer:
only one atom of that element
Explanation:
Example:
H2 O has two hydrogenatoms and ONE Oxygen atom