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Here boron-11 means the name of the element is boron and the mass number is 11. We are given that boron-10 had five protons in its nucleus, and any element always has the same number of protons in its nucleus (atomic number). So boron-11 has five protons the same as boron-10. Then the mass number is total protons plus neutrons. For boron-11 ...
Sep 22, 2016. 5. Explanation: Boron has 5 protons, 5 neutrons and 5 electrons. The atomic number (also known as the proton number) of Boron is 5 as it has 5 protons. It has a mass number of 10, as protons and neutron have a relative atomic mass of 1 each, and a neutral charge, as there are equal numbers of +1 protons and −1 electrons. Answer ...
The bottom number (5) is the atomic number. The atomic number tells you how many protons an atom has. The top number is the mass number (10). The mass number tells you the mass of the atom. The mass of the atom is the combined number of protons and neutrons. Electrons don't contribute much mass at all, so we ignore them for questions like this.
The number of neutrons in an element is the difference between the atomic mass and the atomic number of an element. boron's atomic mass is 11. Therefore, 11 - 5 = 6. There are 6 neutrons in boron.
The unknown number therefore has to be 6, meaning there are 6 neutrons in Boron-11. Boron-11 contains 5 protons and 6 neutrons. 5 protons, 6 neutrons because boron has to have 5 protons and the 11 ...
The mass number of the most common isotope of boron is 11. Please see the more detailed explanation below. This is a slightly tricky question, because a mass number is for a particular isotope of an element, not the element itself. Element number 5 is boron (B). That means every atom of boron has 5 protons. The most common isotope (about 80% of ...
Notice that boron, B, which is located in period 2, group 13 of the periodic table, has an atomic number equal to 5. This means that any atom that has 5 protons in its nucleus will be a boron atom. So, the mass number of this boron isotope is equal to 11, and the atomic number to 5. A = 11 Z = 5 When dealing with an element's isotopes, it's ...
Number of neutrons and stability An isotope of an element is basically the same element but with different number of neutrons. For example here, boron can exist in the forms of boron-10 and boron-11, and so the latter would have one more neutron than the former one. Adding an extra neutron may or may not disrupt the strong force that much, and so the half-life and stability of the new isotope ...
Boron atomic number 5 has five electrons in its ground state. Commonly Boron will lose 3 electrons leaving 2 electrons in its most common ionic form. The atomic number gives the number of protons. Protons which have a positive charge are balanced by an equal number of electrons in a neutral atom. Boron number 5 has five protons and therefore as a neutral atom also has five electrons. Boron has ...
The number of neutrons in an element is the difference between the Atomic Mass and the atomic number of an element. boron's atomic mass is 11. Therefore, 11 - 5 = 6. There are 6 neutrons in boron.