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Did scientists choose carbon as a base for the atomic mass unit which isotope of carbon did they use?
The atomic mass may be considered to be the total mass of protons, neutrons and electrons in a single atom (when the atom is motionless). Relative isotopic mass is the relative mass of a given isotope scaled with carbon-12 as exactly 12.
Why is the atomic mass found on the periodic table not a whole number?
Two reasons. Firstly, the masses listed in the table are usually averages. Carbon naturally comes mainly in two reasonably common and one considerably less common types: carbon-12 (about 99%), carbon-13 (about 1%), and carbon-14 (tiny amounts). If you choose a bunch of carbon atoms at random and measure their masses, you'll get an average that's a little bit higher than 12 (specifically, something close to 12.011). The same is true for most other elements as well. Secondly, except for carbon-12 (which is the standard and by definition has a mass of 12 amu exactly), the actual masses of atoms aren't whole numbers. The binding energy holding the nucleus together throws the total off slightly from what you would expect, due to energy-mass equivalence (E=mc2).
Which of these four radioactive elements would you choose to date a fossil from the most recent epoch?
Four elements are not mentioned but fossils contain organic material that means carbon compounds so carbon-13 isotope is more suitable, in case of radioactive elements that isotope is most suitable which have the half life period in millions of years.
How many quarks are in helium?
That depends on the isotope! Choose an isotope, count the total number of protons + neutrons, and multiply the result by 3, since both protons and neutrons have 3 quarks each. Note: in the case of helium, the number of protons is 2 in each case, but the number of neutrons can vary, depending on the isotope. The most common isotope has 2 neutrons, but there are other isotopes as well.
How do scientists test hypotheses?
Scientists test hypothesis by setting up an experiment. They choose a independent and a dependent variable and test the experiment.
Why did the scientist choose the colour for the planet?
Scientists did not choose the color of any of the planets. They are the color they are simply because of the materials present there.
Why did astronauts choose to land at Mare Tranquillitas?
They didn't choose, the NASA scientists made the evaluation and decision long before the ship was launched.
Why was the atomic bombing choose by the US?
At the time most people thought it was the right thing to end the war.
How many scientists are there?
I want to be a scientist so what kinds, i mean my parents are telling me which scientist do you want to be they told me theirs a lot to choose from so i came here what type of scientists are there?
Why did th us choose Nagasaki as the second target for the atomic bomb?
Because weather was bad in Kokura city.
Why did so many scientists choose to work on the Manhattan project?
Most of them were patriots and some other was soviet spies.
Give 5 examples of non-metals?
Hydrogen, Helium, Oxygen, Nitrogen, Xenon, There are plenty to choose from, just look along the right-hand side of the periodic table
