14 C →
Lie- +
14N
6
A) Two protons are lost and the mass number changes by minus four
B) One proton is lost and there is no change in the mass number
C) Two protons are gained and the mass number changes by a gain of four
D) One proton is gained and there is no change in the mass number

What are similarities and differences of reflection, refraction, diffraction and absorption?

When can a theory be modified if a new type of technology allows for new observations that raise new questions? a-immediately, while the questions about the theory are being asked b-after new hypotheses related to the theory are tested in experiments c-only after the new observations disprove all parts of the theory d-while scientists begin to think about how the theory could improve

Which statement describes the formation of our sun? a disk formed of long trails of stars coiled into a spiral. it formed an elliptical flattened disk. heat and gases contracted within a nebula. gravity pushed stars away from a center core.