Hydrogen because it only has one valence electron I believe.
Answer:
b)
Explanation:
Are those that become tornadoes, reaching the speed of 480km/hour and measuring up to 1500 mts in diameter in the soil, travel more than 100 km away.
Environmental scientists are using GPS ( It is effective but expensive) aerial monitoring (Quick but not the easiest), RFID tags, (mostly for long-term monitoring) and hidden cameras are used to study polar bear behavior without interruption to their environment.
