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Atom clue Number of electrons in a Thulium atom Atomic mass of the most common isotope of Fluorine Atomic mass of a molecule of Cl2 if the atoms are the most common isotopes Atomic number of Aluminum Number of electrons in two atoms of Arsenic Atomic number of Arsenic Atomic mass of one molecule of the most common isotopes of the atoms in the ionic compound known by the common name of table salt Number of electrons in an atom of Boron Atomic mass of the atom with 12 protons, 12 neutrons and 12 electrons Atomic number of the element that starts the Lanthanide series Mass number of the most common isotope of Nickel Mass of the most common isotope of Helium Number of neutrons in the most common isotope of Iron Number of electrons in an atom of the transition metal in group 10 and period 5 Charge on an ion of Magnesium with 10 electrons Atomic number of an element that is a very strong magnet. The element appears in the Lanthanide series. Number of electrons in Co+2 Number of neutrons in the most common isotope of Magnesium Number of protons in two Silicon atoms Atomic number of Holmium Number of electrons in an atom of Phosphorus Number of electron in a Fluorine ion with a negative 1 charge. Number of protons in two Titanium atoms Mass number of the atom Arsenic with 42 neutrons Number of electrons in Ca +2

Atom clue Number of valence electrons for Aluminum Mass number of the most common isotope of Calcium Atomic mass of O2 Mass number of most common isotope of Germanium The number of protons and neutrons in two atoms of the most common isotope of Phosphorus Atomic mass of the isotope Ti-49 Atomic number of the noble gas in period 5 Mass of a Sulfur atom that has two more neutrons than the most common isotope Atomic number of Carbon Average atomic mass of Phosphorus Atomic number of the transition metal in group 6 and period 5 Atomic mass of an atom of Copper with 34 neutrons Number of neutrons in the most common isotope of Potassium Atomic number of the metalloid in group 16 and period 5 Mass number of the most common isotope of Chlorine Number of electrons in Sulfur atom Number of electrons in the 5th period Alkaline Earth Metal Number of protons in a Fluorine atom Atomic number of the fourth nonmetal element in period 17 Atomic number of Hydrogen Number of electrons in an atom of Titanium Atomic number of Copper Atomic number of Cobalt Atomic mass of the compound CaO made with the most common isotopes of Calcium and Oxygen Number of protons in two atoms of Krypton

Atom clue The number of protons in a mixture of one atom of Zinc and one atom of Gallium Number of protons in the ion Rhodium+1 Atomic mass of the most common isotope of Potassium Atomic number of the metal Tin Total mass of a mixture of two Helium atoms and one Argon atom. Atomic number of metal used in the filament of incandescent light bulbs and having an atomic symbol that is the 23rd letter in the alphabet Number of neutrons in the most common isotope of Silicon Number of protons in two atoms of Selenium Number of electrons in an atom of Antimony Group number for Chlorine if Argon is group 18 Number of neutrons in the most common isotope of Nitrogen Atomic mass of the compound Lithium chloride made with isotopes Li-7 and Cl-36. Atomic number of the metal Lu Atomic number of Niobium Number of electrons (or protons) in Iron Atomic number of Vanadium Atomic number of the 5th period Alkali metal Atomic mass of two atoms of Sulfur (most common isotopes) Number of electrons in a Sodium atom. Number of valence electrons in Neon Number of electrons in a Silver atom Atomic number of the fourth period noble gas Mass number of the most common isotope of Zinc Atomic number of the Alkali metal in the 6th period Atomic number of Scandium

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