A sample of a radioactive elements must contain atoms

A.

with a stable nuclei

B.

with unstable nuclei

C.

in the excited state

D.

in the ground state

Identify the electromagnetic waves with the longest wave lenths and the electromagnetic wave with the shortest wave lenghts

An example of an atom that has no change is one that has A. 1 proton, 2 electrons, and 3 neutrons B. 3 protons, 2 electrons, and 1 neutron C. 2 protons, 2 electrons, and 1 neutron D. 3 protons, 1 electron, and 3 neutrons

What is the difference between a radio telescope, x-ray telescope, and optical telescope (both reflecting and refracting)

Once started, why can nuclear fission continue to occur on its own? A. The thermal energy released can cause the products to join. B. The neutron formed by the reaction can cause more nuclei to combine. C.

Which answer accurately describes the difference between speed and velocity? Question 8 options: A. Speed can be constant or it can change. Velocity is always constant. B. Speed requires direction. Direction doesn't matter when calculating velocity.

What units must be used to express the temperature in the equation for the ideal gas law? explain?

Which region of the Sun is typically about 6,000 C?

How well does the infographic ""Plastics in the Ocean"" present a solution to the problem it describes?

Which of the following would be a good question that could be scientifically investigated? what is the best advice a parent can give a child what is the most appropriate number of dogs per household do cherry popsicles freeze slower than orange

Formulas (equations) : A = 3x and B = 5x + 1 As x increases, does A or B go up faster? if x=0, then A=? if x=1 then B=?