Boron has symbol B. The molar mass if same as the atomic mass and the atomic mass of boron is 10.81 amu so its molar mass is 10.81 g/mol. Boron is used in pyrotechnics and flares to produce a green color. Boron has also been used in some rockets as an ignition source. Boron-10, one of the naturally occurring isotopes of boron, is a good absorber of neutrons and is used in the control rods of nuclear reactors, as a radiation shield and as a neutron detector.
Element Boron (B), Group 13, Atomic Number 5, p-block, Mass 10.81. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
What is the mass number and the atomic number of Boron-11?
1 Answer
Explanation:
When dealing with an element's isotopes, it's important to remember that they are distinguished from ech other by the addition of the mass number to the name of said element.
In your case, the name boron-11 is used to designate an isotope of boron that has a mass number equal to
Since mass number is defined as the sum of the number of protons and the number of neutrons the atom has in its nucleus, it follows that you can write
Boron 12 Mass
As you know, the identity of an element is given exclusively by the number of protons it has in its nucleus. This number represents the element's atomic number.
So, to identify the atomic number of boron, take quick look at a periodic table. Notice that boron,
This means that any atom that has
So, the mass number of this boron isotope is equal to
Related questions
A 'weighted average' allows for the fact that there won't be equal amounts of the various isotopes. The example coming up should make that clear.
Suppose you had 123 typical atoms of boron. 23 of these would be 10B and 100 would be 11B.
The total mass of these would be (23 x 10) + (100 x 11) = 1330
The average mass of these 123 atoms would be 1330 / 123 = 10.8 (to 3 significant figures).
10.8 is the relative atomic mass of boron.
Notice the effect of the 'weighted' average. A simple average of 10 and 11 is, of course, 10.5. Our answer of 10.8 allows for the fact that there are a lot more of the heavier isotope of boron - and so the 'weighted' average ought to be closer to that.
Mass Of Boron-11
The mass spectrum for zirconium
The number of isotopes
The 5 peaks in the mass spectrum shows that there are 5 isotopes of zirconium - with relative isotopic masses of 90, 91, 92, 94 and 96 on the 12C scale.
The abundance of the isotopes
Mass Of Boron On Periodic Table
This time, the relative abundances are given as percentages. Again you can find these relative abundances by measuring the lines on the stick diagram.
Mass Of Boron Tribromide
In this case, the 5 isotopes (with their relative percentage abundances) are: Hp envy 7640 printer driver download for mac.