# What is the mass number of a cobalt atom that has 27 protons and 30 neutrons_

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• atom has 36 protons. The number following the element name in krypton-81 is this nuclide’s mass number. The difference between the mass number (the sum of the numbers of protons and neutrons) and the atomic number (the number of protons) is equal to the number of neutrons, so krypton-81 has 45 neutrons (81 - 36).
• $\begingroup$ Also I's point out that (1) Neutrons confounded the relationship between atomic number and atomic mass as chemistry was being understood as a science. (2) In general the mass of different isotopes has a very small effect on chemical reactivity. $\endgroup$ – MaxW Jan 19 '17 at 19:52
• Atom can be divided into a number of sub-atomic particles. Fundamental particles of atom are electron, proton and neutron. charge: It is a neutral particle because it has no charge. Total number of protons and neutrons present in the nucleus of an atom is called "Mass number".
• > An atom is called electrically neutral as atom of an element has equal number of protons and neutrons. Atoms, however, can have electrical charges. Some atoms can either gain or lose electrons (the number of protons never changes in an atom). If an atom gains electrons, the atom becomes negatively charged.
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• Alpha rays consist of four atomic particles: two protons and two neutrons. They are the weakest type of Прочитайте текст. Radioactive substances are composed of unstable atoms that break down and release high-level Some mass (the number of heavy particles inside an atom) is lost in the process.
• A charged object has an unequal number of these two types of subatomic particles while a neutral And neutral objects have a balance of charge - equal numbers of protons and electrons. Just as mass is measured in grams or kilograms, charge is measured in units of Coulombs (abbreviated C)...
• Jan 14, 2016 · Interesting question. Unless you mistyped the question, the answer should be 25+. Basic atomic structure has protons and neutrons located in the nucleus and electrons surrounding the nucleus. Your atom is said to contain 25 protons and 30 neutrons in its nucleus. As you know, protons are positively charged particles. On the other hand, neutrons are neutral particles. This means that regardless ...
• Protons and neutrons have approximately the same mass. However, one proton is about 1,835 times more Atoms always have an equal number of protons and electrons, and the number of protons and Virtually all the mass of an atom resides in its nucleus, according to Chemistry LibreTexts.
• Standard notation shows the chemical symbol, the atomic mass number and the atomic number of an element as follows: For example, the iron nucleus which has 26 protons and 30 neutrons, is denoted as $$_{26}^{56}\text{Fe}$$ where the atomic number is $$Z = 26$$ and the mass number $$A = 56$$. The number of neutrons is simply the difference \(N ...
• Each isotope of a given element has the same atomic number but a different mass number (A), which is the sum of the numbers of protons and neutrons. The relative masses of atoms are reported using the atomic mass unit ( amu ), which is defined as one-twelfth of the mass of one atom of carbon-12, with 6 protons, 6 neutrons, and 6 electrons.
• The mass number represents the number of protons plus neutrons in the nucleus of an atom of the element. The number of protons determines the element, but the number of Cobalt's use in magnetic alloys is critical for devices that must hold a magnetic field, such as electric motors.
• Given data : Number of protons, np= 27 Number of protons, nn= 30 Atomic mass of cobalt, mCo= 56.936291 u. Atomic massview the full answer.
• The mass number minus the atomic number gives the number of neutrons. From reading the periodic table you can tell that chlorine has 17 protons and 18 neutrons (given by M-Z, or 35-17). Mass number = # of neutrons + # of protons. Hint: This is the number to look out for when...
• (c) In general, an atom has an atomic mass number 23 atomic number 11 and 11 electrons. (d) An atom of an element has 11 protons, 11 electrons and 12 neutrons. The atomic mass of an atom is 23. (e) If the nucleus of an atom has atomic number 17, mass number 37 and there are 17 electrons outside the nucleus, the number of neutrons in it is 20.
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Hire an hacker review2.33 (a) 27 (b) 48 (c) 62 2.35 57 27 Co, 58 27 Co, 60 27 Co 2.37 205Tl 2.39 50%. 2.41 Symbol 65Cu 86Kr 195Pt 81Br Number of protons 29 36 78 35 Number of neutrons 36 50 117 46 Number of electrons in the neutral atom 29 36 78 35 Name of element copper krypton platinum bromine 2.43 2 2.45 1 Jul 30, 2008 · Uranium has 92 protons, so its atomic number is 92! If we count the number of protons plus neutrons, we get an atom's atomic mass. Most elements come in different versions, called "isotopes", with different numbers of neutrons. For example, the most common form of carbon is carbon-12 (12 C); that isotope of carbon has 6 protons and 6 neutrons ...
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• An ion is an atom that has a positive or negative charge due to the addition or removal of electrons. X Research source Although the number of protons in the The number of neutrons can be found simply by identifying the atomic mass (found at the bottom of the element on the periodic table) and...The Mole And Avogadros Number Worksheet
• An atom of carbon has six protons. Those six protons without the neutrons and electrons, or the electrons without the other subatomic Subatomic particles also have another purpose. If there is the same number of electrons and protons in the atom, then the atom will be electronically neutral.
• 18.What is the mass number of an atom that consists of 20 protons, 20 neutrons, and 18 electrons? A)an atomic number of 9 B)an atomic number of 16 C)a mass number of 17 D)a mass number of 25 19.An atom that contains 8 protons, 8 electrons, and 9 neutrons has A)number of electrons B)number of protons C)atomic number D)mass number 20.Compared to ...

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The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same.
A neutral atom has the same number of protons and electrons (charges cancel each other out). For hydrogen, the number of protons is 1. For zinc, the number of protons is 30. The number of protons of an atom cannot change via any chemical reaction, so you add or subtract electrons to get...
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Atom can be divided into a number of sub-atomic particles. Fundamental particles of atom are electron, proton and neutron. charge: It is a neutral particle because it has no charge. Total number of protons and neutrons present in the nucleus of an atom is called "Mass number".