PLS HELP Carbon (C) has an isotope that has an atomic number of 6 and an atomic mass of 13. Answer the following questions about this isotope.

How would it be identified in isotope notation?

How many neutrons does this isotope have?

How much energy moves onto the next level, in an energy pyramid

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.

How have the greenhouse gasses increased from the year 2000 to 2018