The most likely location for an electron in H₂ is halfway between the two hydrogen nuclei. Select one: O True O False

2-99 A 7.12 g sample of magnesium is heated with 1.80 g of bromine. All the bromine is used up, and 2.07 g of magnesium bromide is produced. What mass of magnesium remains unreacted?

Epsom salt is used in tanning leather and in medicine. It is hydrated magnesium sulfate, MgSO4 7 H2O. The water of hydration is lost on heating, with the number lost depending on the temperature. Suppose you heat a 1.394-g sample at 100 C and obtain 0.885 g of a partially hydrated sample, MgSO4 x H2O. What is the value of x?

2-12 The elements game, Part 1. Name and give the symbol of the element that is named for each person. (a) Niels Bohr (1885—1962), Nobel Prize for physics in 1922 (b) Pierre and Marie Curie, Nobel Prize for chemistry in 1903 (c) Albert Einstein (1879—1955), Nobel Prize for physics in 1921 (d) Enrico Fermi (1901—1954), Nobel Prize for physics in 1938 (e) Ernest Lawrence (1901—1958), Nobel Prize for physics in 1939 (f) Lise Meitner (1868—1968, codiscoverer of nuclear fission (g) Dmitri Mendeleyev (1834—1907), first person to formulate a workable Periodic Table h) Alfred Nobel (1833—1896), discoverer of dynamite (i) Ernest Rutherford (1871—1937), Nobel Prize for chemistry in 1908 (j) Glen Seaborg (1912—1999), Nobel Prize for chemistry in 1951