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Physics
Physics regards the physical aspects of the natural world. It includes topics that deal with forces on different bodies within the universe and phenomena that explain how the universe works.
500 Questions
Where was radium first used?
Asked by Wiki User
Probably after 1910, for luminescent paints.
Today radium has only limited applications in research laboratories, for example for the preparation of radon standard solutions, in neutron sources of the type Ra-Be, etc.
Possible use in radiotherapy of some cancers.
Radium was used in the past for luminescent painting of watches and other instruments, was used in toothpaste, cosmetics, etc. These applications are not permitted now because radium is strongly radioactive and dangerous.
How can you determined the number of valance electrons by looking at the periodic table?
Asked by Wiki User
Elements are located on the periodic table based off of their atomic number, but the vertical columns they are in (groups) show how many valence electrons they have. If an element were in Group 3 of the periodic table, it would have 3 valence electrons, and so on. This doesn't apply to the Transition Metals, so one should skip straight to Group 14, where the elements all have 4 valence electrons. Group 15 has 5, Group 16, 6, etc. The one exception to this is Helium, which is in Group 18 but only has 2.
Where you can found solution manual for Thomas finney 9th edition and fundamental of physics by walker resnick halliday 6th and 7th edition?
Asked by AFRIDI21
What was does Einstein's theory of relativity state and what does each letter mean?
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What describes how well screen phosphor takes x-ray photons and converts them to visible light?
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Math Q A model rocket has a mass of 0.12kg it accelerates vertically to 60.0m per s in 1.2s if the force of gravity on the rocket 1.2N what is the total thrust of its engine?
Asked by Natasha050
What are some examples of radiation conduction and convection from our daily lives?
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How does newtons second law of motion explain why the shuttles accaleration increases during takeoff?
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Why doesn't a boat on a lake move forward when water wave passes.describe the boat's motion?
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