If the atomic number of an element is 12 and the atomic mass is 25: a. How many protons are there in the nucleus? b. How many neutrons are there in the nucleus? c. How many electrons are in the atom? Which of the following is chemically inert (unreactive)? A) sodiu...
If you know the atomic number and the mass number of an isotope of an element, how can you determine the number of protons and neutrons? How do you tell how many valence electrons there are in an element by looking at the periodic table?
These are chemical elements, like carbon or uranium, that are identical except for one key feature -- the number of neutrons in their nucleus. Atoms may have an equal number of protons and neutrons. If, however, there are too many or too few neutrons, the atom is unstable, and it ...
These particles, made up of protons and neutrons, are large and can only travel a short distance -- in fact, they can be stopped with just a piece of paper or even your skin. However, inhalation or ingestion of alpha particles can be very dangerous. Once inside your body, alpha ...
42、ving outwards,但随后,高能中子猛烈撞击这些物质but then, high-energy neutronscome slamming into this然后就开始一个接一个地生成material and start to buildheavier elements,更重的元素one after another.我们可以看到金,可以看到钾We can see the gold,we can see the potassium,可以看到钚就在我们眼前we...
As we learned in intro physics, everything is made up of atoms, and atoms are made up of protons, neutrons and electrons. Protons have a positive charge, neutrons have a neutral charge, and electrons have a negative charge. Note that the atoms themselves can carry a positive or a ...
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with a beam of argon-34. (The number after an isotope indicates its total number of protons and neutrons.) The result of that fusion produced calcium-38 nuclei, which have 20 protons and 18 neutrons. Because those nuclei were excited, they ejected protons and ended up as potassium-37 nuc...
You can think of this as counting each proton or neutron as 1 and ignoring the masses of electrons because they are so small in comparison. So the formula for relative atomic mass is simply: Relative atomic mass = number of protons + number of neutrons However, since scientists set a ...
Isotopesare different versions of the same element (e.g., carbon, uranium, potassium); they have the same number ofprotons, which is why the identity of the element does not change, but different numbers ofneutrons. You are likely to encounter people and other sources that refer to radiometr...