Boron is one position to the left of carbon on the periodic table. The atomic nurnber of carbon is 6. Given its position on the periodic table, what is the atomic number of boron?

are given by the name of the element and the . Here boron-11 means the name of the element is boron and the mass number is 11. We are...

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...

The relative of carbon is 12.011, which is extremely close to 12.0. This means that the masses C-13, and C-14 are practically negligible when contributing to the relative atomic mass...

This is called the of the element. To make it up to 13 in carbon-13, you will need 7 neutrons. Stable isotopes are not useful at all in radio-dating,...

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...

The answer is B) The must be exactly twice the for each atom. The number of protons is the atomic number of an element. The mass number is the sum...

$Be, Z=4, 1s^(2)2s^2.$ $B, Z=5, 1s^(2)2s^(2)2p^1.$ A priori , should it be easier to remove a $p-$orbital electron, which by definition has zero electron at the nucleus? An $s-$orbital electron,...

$(35.76*g)/(10.81*g*mol^-1)$ $xx$ $6.022xx10^23$ $mol^-1$ $=$ $??$

So, $"moles of boron"$ $=$ $(1.21xx10^24" boron atoms")/(6.022xx10^23" boron atoms"*mol^-1)$ $=$ $"How many moles?"$ I count about 2. What is the mass of this molar quantity?

For starters, notice that your sample contains $24.08 * 10^(23) = 4 * (color(blue)(6.02 * 10^(23)))$ atoms of boron. At this point, you should be able to recognize...