An atom has an electron configuration of 1s2 2s2 2p6 3s2. How many valence electrons does this atom has?.

Which object has the least amount of kinetic energy? a. a car driving down a road b. a soccer ball rolling down a hill c. a bicycle locked to a bike rack d. a satellite orbiting earth

How do you work out 21.3-8= show your working. plz

When looking at research about instructional strategies, make sure the research is a. from peer-reviewed studies. b. approved by state and federal government organizations. c. online and easily accessible. d. about the same topic you're interested in.