Examlex
Q12: Based on the following figure,the name of
Q19: Which is a diatomic element?<br>A)Iron<br>B)Bromine<br>C)Boron<br>D)Zirconium
Q41: All noble gases have eight electrons in
Q49: Which is ferrous sulfide?<br>A)FeS<br>B)Fe<sub>2</sub>S<sub>3</sub><br>C)Fe<sub>3</sub>S<sub>2</sub><br>D)FeSO<sub>4</sub>
Q50: Express the number 4.317 <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB4036/.jpg" alt="Express
Q95: When the equation H<sub>2</sub>O<sub>2</sub> <span
Q96: On the periodic table,the "representative elements" are
Q98: Complete and balance the equation for
Q110: Reactions which absorb heat are<br>A)endothermic.<br>B)exothermic.<br>C)isothermic.<br>D)protothermic.
Q111: What is the formula of aluminum sulfide?<br>A)AlS<br>B)Al<sub>2</sub>S<sub>3</sub><br>C)Al<sub>3</sub>S<sub>2</sub><br>D)Al<sub>3</sub>S