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Author Question: An atom can be excited a. if it emits a photon. b. if it collides with another atom or electron. ... (Read 118 times)

yoroshambo

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on: Jul 27, 2018
An atom can be excited
 
  a. if it emits a photon.
  b. if it collides with another atom or electron.
  c. if it absorbs a photon.
  d. if it emits a photon or if it collides with another atom or electron.
  e. if it collides with another atom or electron or if it absorbs a photon.

Question 2

The time for the Moon to repeat its cycle of phases is equal to
 
  a. its sidereal period.
  b. one day.
  c. one hour.
  d. one year.
  e. its synodic period.


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jxjsniuniu

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Reply #1 on: Jul 27, 2018
Answer to Question 1

e

Answer to Question 2

e


yoroshambo

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Reply 2 on: Jul 27, 2018
:D TYSM

JCABRERA33

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Reply 3 on: Yesterday
Excellent

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