Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. Neutrons, like protons have an atomic mass, but lack any charge, and hence are electrically neutral in respect to electrons. How To Calculate The Number of Protons, Neutrons, and Electrons . Anion- bears more electrons than protons, so it has negative charge. The number of protons in an atom is not changeable so you can add or subtract electrons to get the charge. So 415 microgram or 4.15x10^-4 g of selenium is 4.15x10^-4 /78.96 =5.256x10^-6 (mole), which is equivalent to 5.256x10^-6 x 6.022x10^23 or 3.165x10^18 (selenium atoms). The number of protons and electrons in an atom or molecule determines its charge and whether it is a neutral species or an ion. Locate where selenium is (see attachment).First, the number of proto… 12), meaning there are (in the most common isotope) 6 neutrons. 160. Protons and neutrons are in the center of the atom, making up the nucleus. 16 16 Selenium-50. With a proton number of 34, it means that the element is that which has 34 as its atomic number. 30 (Atomic no. basically defines an element. Number of protons in selenium (Se) is 34.Protons are present in the nucleus of selenium (Se) . 48. Therefore,the number of neutrons in selenium (Se) is 45 here for this isotope.Remember that neutrons are present in the nucleous of selenium (Se) and it's charge is zero. Answer and Explanation: The number of protons and electrons can be determined from the atomic number. Neutron- does not bear a net of electric charge. Example: Zn 2+ (meaning the ion has exceeded 2 protons over the number of electrons.) The charge on the proton and electron are exactly the same size but opposite. Even though electrons, protons, and neutrons are all types of subatomic particles, they are not all the same size. Therefore, the number of electrons of selenium … Once you know where to look, finding the number of protons, neutrons, and electrons will be a breeze. Since this atom is neutral the positive protons must be equal to the negative electrons. For each selenium atom, there are 34 protons, 45 neutrons, 34 electrons. The atomic number, Z, specifies the number of protons, positively charged, massive, fundamental particles present in the sulfur nucleus. C. atomic number 6. that means 6 protons. number 30 on periodic table = Zn, zinc ... the number after the dash is the mass number = sum of protons and neutrons ... 30 + 34 = 64, so this is Zinc-64 The number of electrons depends on whether the atom has a charge. An electron has very little mass by comparison, protons have a positive charge, electrons have a negative charge, and neutrons-none. Thus the mass number, or the mass of the atom, is the sum of the number of protons and neutrons. Each atom has different numbers of protons, neutrons, and electrons. protons neutrons weight, proton neutron mass ratio, protons neutrons electrons quizlet, protons neutrons electrons titanium, proton neutron scattering, Selenium has atomic number 34 so it always will have 34 positive protons. And that is how the atoms preserve their identity and uniqueness. 112. # of protons = 17 # of neutrons = 37 – 17 = 20 # of electrons = 17 – 0 = 17 # of protons = 16 (the atomic number is not given, but can be found on the periodic table) # of neutrons = 32 – 16 = 16 # of electrons = 16 – (-2) = 18. Selenium-55 # of protons 34 34 # of neutrons 16 21 # of electrons 34 34 Sodium-12 Sodium-20 # of protons 11 11 # of neutrons 1 9 # of electrons 11 11 PART III. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. , there are ( in the atomic structure a net of electric charge neutrons # selenium... 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