Helium 2 He 27 4.0026 2. 1. What is the atomic mass of Helium? Using that, determine the number of neutrons in a Helium atom. Atomic Mass= Neutrons=

2.What is the atomic number of Helium? What subatomic particle does it refer to? *Remember APE MAN! He (Helium) Atomic Number= Atomic # is equal to the # of HA

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.

What is the main reason why some developing countries fear the increase the free trade policies around the world?

Which is true of a liquid? it has a definite volume but not a definite mass. it has a definite mass but not a definite volume. it has a definite volume but not a definite shape. it has a definite shape but not a definite volume.