Do all atoms carry the same number of protons and neutrons? Why or why not?

No

Explanation:

The number of protons in each atom is also it's atomic number on the periodic table, meaning each pure element has a different number of protons.   You can tell how many neutrons are in an atom by looking at the atomic mass, which is protons + neutrons = atomic mass.

You are given the protons in the atomic number so take that minus the atomic mass to get the number of neutrons.

No

Explanation: Some atoms don't 'need' neutrons The hydrogen atom does not have any neutrons. However, as  # of protons increases, the number of neutrons increases as well. Naturally, 'positive charges repel', so it wouldn't be possible to have more than one proton in the nucleus.

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles