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Assignemnt 1-Midterm

Chemistry of Life-Week 2

QuestionAnswer
How to determine mass number of an element? the number of protons plus the number of neutrons in the atom’s nucleus
How many elements naturally occur on Earth? 92 elements
What is the Octet Rule? atoms with fewer than eight electrons in the outer energy level will attempt to lose, gain, or share electrons with other atoms to achieve stability
What is it called when unequal charge is distributed within a molecule? Polar
Which chemical bond formed by the sharing of one or more pairs of electrons between the outer energy levels of two atoms? Covalent Bond
What is an Ionic Bond? the strong electrostatic force that binds the positively and negatively charged ions together
What result in the breakdown of a complex substance into two or more simpler substances? Decomposition Reactions
What are the three basic types of chemical reactions? 1. Synthesis reactions 2. Decomposition reactions 3. Exchange reactions
Which describes chemical reactions that break down larger food molecules into smaller chemical units releasing energy? Catabolism
This involves the many chemical reactions that build larger and more complex chemical molecules from smaller subunits? Anabolism
Created by: hannahmalack
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