Arrange: Click Next element to select carbon. Add a second electron to the first 2p orbital. (not the second or the third 2p orbital)
Click Check. What feedback is given?
Electrons are properly arranged in shells.
Electrons not properly arranged in consecutive shells.
Electrons are properly arranged in energy levels.
O, Electrons not properly arranged in energy levels.

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

The is a particle with one unit of positive charge a. proton b. positron c. electron d. nucleus awnser quick it is a important science test!

What is a metal replacement reaction