chemistry dictionary

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Across
  1. 3. Mass / The average mass of atoms of an element, taking into account the relative abundance of its isotopes.
  2. 6. / The ability of a material to conduct electric current, often associated with the mobility of electrons within the material.
  3. 10. / An element that lacks metallic properties, typically characterized by poor conductivity and non-lustrous appearance.
  4. 11. / A subatomic particle with a negative charge, orbiting the nucleus of an atom.
  5. 13. Melting/Boiling Point / The temperature at which a substance changes from a solid to a liquid (melting point) or from a liquid to a gas (boiling point), typically measured in degrees Celsius or Kelvin.
  6. 15. Number / The number of protons in the nucleus of an atom, defining the identity of an element.
  7. 16. / A group of elements characterized by their luster, conductivity, malleability, and ductility.
  8. 18. Compounds / Chemical compounds formed by the transfer of electrons from one atom to another, resulting in the formation of ions held together by electrostatic forces.
  9. 19. Ions / Ions composed of two or more atoms covalently bonded together, carrying a net electric charge.
  10. 20. / Having more than one possible valence or oxidation state.
  11. 21. / A subatomic particle with no charge (neutral), found in the nucleus of an atom.
  12. 23. / A pure substance composed of atoms with the same atomic number, characterized by its unique chemical properties.
  13. 24. / A group of nonmetallic elements found in Group 17 of the periodic table, including fluorine, chlorine, bromine, iodine, and astatine.
Down
  1. 1. Particles / Particles that are smaller than an atom, including protons, neutrons, and electrons.
  2. 2. / A subatomic particle with a positive charge, found in the nucleus of an atom.
  3. 4. / An element with properties intermediate between metals and nonmetals.
  4. 5. / The physical form of matter, such as solid, liquid, or gas.
  5. 7. Model / A simplified model of the atom with electrons orbiting the nucleus in discrete energy levels or shells, proposed by Niels Bohr.
  6. 8. / The basic unit of a chemical element, composed of a nucleus containing protons and neutrons, with electrons orbiting around the nucleus.
  7. 9. / The mass of a substance per unit volume, typically measured in grams per cubic centimeter (g/cm³).
  8. 12. Gases / A group of unreactive elements found in Group 18 of the periodic table, including helium, neon, argon, krypton, xenon, and radon.
  9. 13. / A group of atoms held together by covalent bonds, representing the smallest unit of a chemical compound.
  10. 14. / The amount of space occupied by a substance, typically measured in cubic meters (m³) or cubic centimeters (cm³).
  11. 17. Compounds / Chemical compounds formed by the sharing of electron pairs between atoms.
  12. 22. Earth Metal / A group of metallic elements found in Group 2 of the periodic table with two valence electrons, including beryllium, magnesium, calcium, strontium, barium, and radium.