Chemistry, 27.02.2021 05:00, naenae2cold12021
Please help, I'm confused and it's due very soon!
1. Draw the atomic structure of an atom of lanthanum with an atomic mass of 139 amu. Calculate the correct number of protons, neutrons, and electrons. Show the structure of the electrons within their shells.
2. Why is this rare earth metal used to store hydrogen fuel in electric-powered vehicles?
3. How can the periodic table be used to predict the reactive nature of lanthanum?
Answers: 2
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Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d
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Chemistry, 22.06.2019 19:00, miguel454545
Avolleyball player hit a ball with a mass of 0.25 kg. the average acceleration of the ball is 15.5 m/s². how much force did the volleyball player apply to the ball? 62.0 n 3.87 n 62.0 m/s² 3.87 m/s²
Answers: 2
Please help, I'm confused and it's due very soon!
1. Draw the atomic structure of an atom of lantha...
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