Describe in your own words why lithium, magnesium, and boron (groups 1,2,13) elements tend to form positive ions and fluorine, oxygen, and nitrogen (groups 15,16,17) tend to form positive ions.

Explain how geckos climb glass.

Which of these describes the flow of energy as rock salt is dissolved in water? Choose the correct answer. A) Energy is absorbed by the reaction, and the temperature of the surroundings decreases.

7. To be classified as organic, a chemical's molecules must be A decomposed B based on oxygen OC based on carbon OD living

Identify your unknowns and use your experimental evidence to support your identification

It is easier to push a sofa across a rough surface like carpet than a smooth surface like a hardwood floor. True False

Which microscope came out first

Which exerts greater pressure on the floor-standing flat-footed or standing on tiptoe? on tiptoe, because the force acts over less area on tiptoe, because the force acts over more area flat-footed, because the force acts over more area flat-footed,

1. Sara tells Michael she is 160 centimeters tall, while Michael says he is 60 inches tall. If there are 2.54 centimeters in an inch, who is taller

How do you tell if a compound is polar or non polar

What two ions are central to the arrhenius definitions of acids and bases?