Chemistry 12th Edition

Published by McGraw-Hill Education
ISBN 10: 0078021510
ISBN 13: 978-0-07802-151-0

Chapter 8 - Periodic Relationships Among the Elements - Questions & Problems - Page 366: 8.135

Answer

Please see the work below.

Work Step by Step

(a) A pale yellow gas that reacts with water - Fluorine ($F_{2}$). Fluorine reacts with water to form $HF$ and $O_{2(g)}$ (b) A soft metal that reacts with water to produce hydrogen - Sodium (Na). Sodium is a soft metal; it reacts vigorously with water to form $NaOH$ and $H_{2}(g)$. (c) A metalloid that is hard and has a high melting point - Boron (B). Boron is a metalloid; it is a dark crystalline hard substance with a melting point of $2000 ^{\circ}C$. (d) A colorless, odorless gas - Nitrogen ($N_{2}$) Nitrogen is a colorless odorless gas. (d) A metal that is more reactive than iron, but does not corrode in the air - Aluminum (Al) Aluminum is a metal that displaces iron from its solution. But it does not corrode in the air due to the formation of a thin oxide layer.
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