Construct as a star dies, it becomes denser
s temperature rises to a point where
helium (he) nuclei fuse with other nuclei
when this happens, the atomic numbers of
the other nuclei are increased by 2 because
each gains the two protons contained in
che he nucleus. for example, chromium
(c) fuses with he to become iron (fe)
copy and complete the concept map
showing the first four steps in he fusion

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change. when the temperature in a room increases from 25°c to 33°c, changes from a solid to a liquid. in a lab, methane and nitrogen are cooled from -170°c to -200°c. the methane freezes and the nitrogen . when gold is heated to 2,856°c it changes from a liquid to a .

What is the formula for the compound dinitrogen pentoxide? a. n4o5 b. n5o4 c. n4o6 d. n5o2 e. n2o5

What is a number added in front of a formula in order to balance the equation