1. What does a Lewis dot diagram of an atom represent? all electrons valence electrons protons neutrons

What is the pH range compatible with life? 6.8 to 8.0 6.1 to 8.7 5.0 to 8.5 7.0 to 9.0

In this chemical reaction 6 moles of each of the reactants is combined $3Mg+N_{2}\rightarrow Mg_{3}N_{2}$ How many moles of excess reagent will be left over? 250 words remaining $\square $

What is the most toxic of the known chemical agents? Blood agents Nerve agents Blister agents Choking agents

Tear gas, lacrimators , and irritants are types of which of the following chemical agents? RCAS TICs Incapacitating agents CWAS

9. Which of the following is true about ionic bonding? a. It is mostly formed between electrons on the left side of the periodic table b. Lithium Fluoride is formed by ionic bonding c. Electrons are donated from one element to another d. All of the above e. None of the above

Question 9 (Mandatory) (2 points) Muddy water is which of the following? Heterogeneous mixture Pure compound Element Homogeneous mixture

Identify: If the atomic number for oxygen is 8, how many protons are in the nucleus of each of its atoms? 2 4 8 16

Construct your multiple choice prompt here. Ammonium nitrate is colourless crystalline substance. It has a melting point of $169.6^{\circ }C$ What is the formula for Ammonium Nitrate? $NH_{4}NO_{3}$ $NH_{4}(NO_{3})_{2}$ $NH_{4}(NO_{2})_{3}$ $(NH_{4})_{2}(NO_{2})_{2}$

Is this an example of an Exothermic or Endothermic situation? A cake being baked Exothermic Endothermic

Give the pH of a strong acid. __ Give the pH of a strong base. __