Choose the nonmetallic elements from the list. Check all that apply. Yttrium
Oxygen
Boron
Polonium
Argon
Gallium
Carbon

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?

If element x has 99 protons how many electrons does it have