Element 44 = atomic # 44 44 protons 44 electrons 66. How many protons and electrons are contained in an atom of element 44?

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element 44 = atomic # protons 44 electrons 66. How many protons and electrons are contained in an atom of element 44?

mass number (p + n) 12 -atomic number (p) - 6 = # of neutrons6 n 67. A carbon atom has a mass number of 12 and an atomic number of 6. How many neutrons does it have?

protons 80 + neutrons = Mass number An isotope of mercury has 80 protons and 120 neutrons. What is the mass number of the isotope?

69. An isotope of xenon has an atomic number of 54 and contains 77 neutrons. What is the xenon isotope’s mass number? protons 54 + neutrons + 77 = Mass number 131

18 protons 70. Is an atom has 18 electrons, how many protons does it have?

Element Cl Zr Atomic Number Mass Number Protons Neutrons Electrons 17 40

electrons protonsneutrons a) Cs b) Co c) Tm d) Zn How many electrons, protons, and neutrons are contained in each?

electrons protons neutrons a)Gallium b) fluorine c) titanium d) tantalum How many electrons, protons, and neutrons are contained in each?

Ga- 69 must be more abundant because the atomic mass of gallium is closer to the mass of Ga-69 than the mass of Ga Ga, which has atomic mass of amu, has two naturally occurring isotopes, ga-69 and Ga-71. Which isotope occurs in greater abundance? Explain.

amu 77. Silver has two isotopes Ag, which has a mass of amu and a percent abundance of 52.00% and Ag, which has a mass of amu and a percent abundance of 48.00%. What is the atomic mass of silver? x.5200 = x.4800 = 52.27

51.99 amu 78. Data for chromium’s four naturally occurring isotopes are provided in the table. Calculate the atomic mass (amu). IsotopePercent AbundanceMass (amu) Cr Cr Cr Cr = 2.17 = = 5.03 = 1.27