Boron has two isotopes, boron-10 and boron-11. Boron-10 has five protons and five neutrons. How many protons and neutrons does boron-11 have? Explain.

For $B$, $Z=5$, i.e. its nucleus contains 5 protons, 5 positively charged, massive particles. And if there 5 protons, the neutral atom has 5 electrons conceived to whiz about the...

carbon-12 and carbon-14 are of the same element, carbon. this means that they have the same number of protons and the same number of electrons - just different numbers of...

The abundance of $""_8^16"O"$ is 99.762 %, and the abundance of $""_8^18"O"$ is 0.201 %. Assume you have 100 000 atoms of O. Then you have 37 atoms of $""_8^17"O"$...

The most important thing to keep in mind here is that are atoms that have the same number of protons inside their nuclei. In other words, an isotope...

Isotopes, $""^15N$, $""^13C$, are the same chemically as the isotope they replace. They are not the same spectroscopically. Mass spectroscopy would certainly differentiate between the isotopes. In addition, there might...

The of boron is 10.81 u. And 10.81 u is a lot closer to 11u than it is to 10u, so there must be more of boron-11. To...

And $Z$ defines the identity of the element: $Z=1,H;Z=2,He;..........Z=6,C;........Z=37, Ru...........$ You don't have to remember these numbers, because a Periodic Table will be supplied to you in every test of...

Background Info Most elements have different isotopes, or atoms with the same number of protons, but different numbers of neutrons. Hence, it is possible to have two atoms that are...

Isotope $A$ has 12 nuclear particles. Since there are 6 protons, the element $A$ is $""^12C$, and $B$ is $""^14C$. I can define the identity of the element and its...

$Z$, $"the atomic number"$ of magnesium is 12. This means that there are 12 positively charged nuclear particles. This defines the particle as a magnesium atom. To represent the $""^24Mg$...