Which is the only element in group 1 on the periodic table that forms covalent bonds? hydrogen
lithium
potassium
sodium

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground. what is his gravitational potential energy above the ground?

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little