Calculate the atomic mass of element X if there are two isotopes of this element (X-24 and X-28) and 75% of all X atoms are X-28 isotopes? 52 amu 26 amu 4 amu 27 amu

The smallest unit of charge is - 1.6*10-19 C, which is the charge in coulombs of a single electron. Robert Millikan was able to measure the charge on small droplets of oil by suspending them between a pair of electrically charged plates.

The science study of fossils and ancient life is?

Which is true about mechanical waves A. It must travel in empty space B. Both sound and light are examples. C. It must have a medium D. It can travel in a vacuum.

Which of the following is considered to be the minimum height tide? spring tide fall tide neap tide

Which changes can reach dynamic equilibrium A - nuclear only B - chemical only C - nuclear and physical D - chemical and physical

Which best describes the mass of protons, neutrons and electrons

The last column of the periodic table contains the noble gases, elements that do not easily form chemical bonds.

In the laboratory how could you determine if a solid as an ionic or metallic bond

Which object (s) formed last in our solar system? the Sun the solar nebula the inner planets the planetesimals

How many grams of sodium are represented by the symbol Na?