A change in the color or smell of a substance might suggest what?

X-ray photons with a wavelength of 0.135 nm. express the energy numerically in kilojoules per mole.

If two protons and two neutrons are removed from the nucleus of an oxygen-16 atom, a nucleus of which element remains

Near the shore, winds tend to blow toward the land during the day. What drives this process?

A noble gas consists of three isotopes of masses of 19.99 amu, 20.99 amu, and 21.99 amu. the relative abundances of these isotopes are 90.92%, 0.257%, and 8.82% respectively. what is the average atomic mass of this noble gas? what noble gas is this?

Look at the diagram showing the different wavelengths in sunlight. Which has a wavelength of 350 nanometers? red light violet light infrared light ultraviolet light

Why do cells have a limit to how big or small they can be?

Which of the following subatomic particles is found the farthest from the center of the atom? a. A neutral particle that is found in the electron cloud b. A negative particle that is found in the nucleus c.

The nonmetals in groups 5a, 6a, and 7a question 15 options: lose electrons when they form ions. form ions with charges of 3-, 2-, and 1-, respectively. form positively charged ions. form ions with a numerical charge equal to their group number.

How many protons are in a electrons?

What is the sum of the numbers of neutrons and electrons in the ion 208 Pb2+?