Indicate whether each statement about the nucleus of an atom is true or false.

1. the nucleus of an atom is neutral. the nucleus of an atom contains only neutrons.
2. the number of nucleons present in the nucleus is equal to the number of electrons present outside the nucleus.
3. the nucleus accounts for almost all the volume of an atom. the nucleus accounts for almost all the mass of an atom.
4. the nucleus can be positively or negatively charged depending on the identity of the atom.

The earth's moon is unusually large. two popular theories of the moon's origin include the "sister world" hypothesis, which states that the moon formed from the same materials as the earth, near enough to the earth that they fell into orbit around each other. a second theory is the "capture" hypothesis, in which the moon formed elsewhere in the solar system, and the earth's gravity pulled it into its orbit. studies of what the moon is made of indicate that some of its materials had to come from the earth or from the same area of the solar system where the earth had formed. at the same time, the moon does not contain much of the material that makes up the earth's core, so the moon could not have formed from the same materials as the earth. how do the two facts above affect the described theories of the moon's origin? a. they show that scientists will never agree on where the moon came from. b. they show that more experiments on moon formation need to be done. c. they show that no theory accounts for the existence of the moon. d. they show that neither theory is complete and entirely correct.

Is 9 correct? and can someone me with 10? it’s due tomorrow, you

Draw the structure for 5-isopropyl-2-methyl-3-nonene