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Q4: Which of the following has the electron
Q31: Sr(s) + P<sub>4</sub>(s) <span class="ql-formula"
Q48: How many of the following are pure
Q56: What element has the electron configuration 1s<sup>2</sup>2s<sup>2</sup>2p<sup>6</sup>3s<sup>2</sup>3p<sup>6</sup>4s<sup>2</sup>3d<sup>10</sup>4p<sup>6</sup>5s<sup>2</sup>4d<sup>10</sup>5p<sup>6</sup>6s<sup>2</sup>4f<sup>14</sup>5d<sup>10</sup>6p<sup>5</sup>
Q64: Determine the number of protons and the
Q66: Convert: 460.2 g MgCl<sub>2</sub> = _ units
Q87: The symbol for lead is<br>A) Ld<br>B) Pb<br>C)
Q96: Hydrogen has four naturally occurring isotopes.
Q157: Choose the correct name for HNO<sub>2</sub>.<br>A) hydronitric
Q187: Give the formula for hydroiodic acid.