Dmitri mendeleev and henry moseley developed their periodic tables about forty years apart. during that time, many discoveries in chemistry were made. which fact was most likely discovered between the time of mendeleev’s table and the time of moseley’s table that moseley develop his version? atomic mass is the average mass of different samples of the same element. different elements can have similar chemical properties even if their atomic masses are different. the number of protons in an atom is different than the atom’s total mass. protons strongly affect an element’s atomic mass, while the electrons in atoms do not.
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Physics, 22.06.2019 03:00, trinitieu66
Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.
Answers: 2
Physics, 22.06.2019 17:30, brennae1801
The items in the following list are all units of matter. which is the smallest unit that retains the properties of the matter? a.) atom b.) compound c.) electron d.) element
Answers: 1
Physics, 23.06.2019 01:30, martinezkimberly706
Match each type of lever with the correct diagram. 1. first-class 2. third-class 3. second-class
Answers: 3
Dmitri mendeleev and henry moseley developed their periodic tables about forty years apart. during t...
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