Atoms, Elements and Periodic Table Crossword Puzzle
QUESTIONS LIST: mendeleev: the russian chemist who first organized the periodic table by atomic mass in 1869, atomic number: the modern periodic table is organized according to this value, not atomic mass, periodic law: this law states that the physical and chemical properties of elements follow a repeating pattern when arranged by atomic number, energy levels: areas of space around the nucleus where electrons are most likely to be found; like layers of an onion, valence electrons: the electrons in the outermost energy level of an atom, which determine chemical reactivity, noble gases: group of elements that do not naturally combine with others; found in group 18 and colored dark purple on the periodic table, alkali metals: highly reactive metals found in group 1 and represented in red on the periodic table, transition elements: the yellow-colored block of elements found in the center of the periodic table, often used in industrial processes, halogens: group 17 elements known for forming salts and shown in purple on the periodic table, bohr rutherford: a diagram showing electrons in circular energy levels around the nucleus, metalloids: elements that have properties of both metals and non-metals; located between metals and non-metals on the periodic table and colored blue.