a physical reaction is_____.\n a change that does not make something new and different from the starting…

a physical reaction is_____.\n a change that does not make something new and different from the starting substances\n a change that makes something new and different from the starting substances.\n an explosion\n a red apple\nquestion 9\n54\nxe\nxenon\n131.29\nhow many protons does the element xenon have?

a physical reaction is_____.\n a change that does not make something new and different from the starting substances\n a change that makes something new and different from the starting substances.\n an explosion\n a red apple\nquestion 9\n54\nxe\nxenon\n131.29\nhow many protons does the element xenon have?

Answer

Brief Explanations:

  1. For the first - part about physical reaction: In chemistry, a physical reaction is a change that does not create a new substance. For example, melting ice is a physical change as it is still water in a different state.
  2. For the second - part about Xenon: The atomic number of an element is equal to the number of protons. The atomic number of Xenon (Xe) is 54, so it has 54 protons.

Answer:

  1. a change that DOES NOT MAKE SOMETHING NEW and different from the starting substances
  2. 54