Answer:
101.75 km/hr
Explanation:
average speed is the distance traveled ÷ time traveled
= 1221 ÷12 = 101.75 km/hr
Answer:
The weird one that looks like a B is a symbol for a beta ray.
"He" and the infinity looking a represents an alpha particle.
6= Beta ray
7 & 8= alpha particle
This type of compound represents ionic because there is a metal and a non-metal elements