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Chemical Elements and Compounds
Atomic Structure
Chemical Bonding
Chemical Reactions
Miscellaneous
100
A substance that cannot be broken down to other substances by chemical reactions (i.e. Fe).
What is an element?
100
The smallest unit of matter that still retains the properties of an element.
What is an atom?
100
These are formed when atoms combine through chemical bonding.
What are molecules?
100
This is crucial in biology because it determines how most biological molecules recognize and respond to one another.
What is molecular shape?
100
When is our quiz over Chemistry - Chapter 2?
What is Friday?
200
A substance consisting of two or more elements combined in a fixed ratio (i.e. NaCl).
What is a compound?
200
Subatomic particles that have varying charges and make up an atom.
What are neutrons, protons and electrons?
200
The sharing of a pair of valence electrons by two atoms.
What is a covalent bond?
200
The making and breaking of chemical bonds.
What are chemical reactions?
200
How many Advanced Biology students should attempt the retake quiz for "The 10 Themes of Biology" - Chapter 1?
What is all students?!!!
300
The number of natural elements that are known to be essential to life (out of a total of 92!).
What is 25?
300
An isotope in which the nucleus decays spontaneously, giving off particles and energy.
What is a radioactive isotope?
300
The attraction of an atom for the electrons of a covalent bond.
What is electronegativity?
300
The molecules that react in a chemical reaction and the molecules they form.
What are reactants and products?
300
The times when a student may come in and ask Ms. Drees or Mr. Goudy to clarify information on Chapter 2 that they do not understand before they take the quiz on Friday.
What are before school, during school and after school? (Wow!)
400
These four elements make up 96% of living matter.
What are carbon (C), oxygen (O), hydrogen (H) and nitrogen (N)?
400
The outermost shell of an electron cloud where electrons contain the most energy.
What is the valence shell?
400
This forms when a hydrogen atom covalently bonded to one electronegative atom is also attracted to another electronegative atom.
What is a hydrogen bond?
400
6 CO2 + 6 H2O -> C6H12O6 + 6O2
What is Photosynthesis?
400
The most important study tool a student in Advanced Biology can use to prepare for the Chemistry quiz on Friday.
What is read the textbook? (Yes, indeed!)
500
This explains how all living organisms on the Earth are made of the same basic elements.
What is the Evolution Connection?
500
The reactivity of atoms arises from the presence of these subatomic particles in one or more orbitals of their valence shells.
What are unpaired electrons?
500
A weak bond that is formed when electrons accumulate in one part of the molecule or another, creating brief "hot spots" of positive and negative charge that enable all atoms and molecules to stick to one another.
What are van der Waals interactions?
500
The point at which reactions offset one another exactly; even though the reactions are still going on, no net effect on the concentrations of the reactants and products occurs.
What is dynamic equilibrium?
500
"Sunny Day, sweepin' the clouds away. On my way to where the air is sweet. Can you tell me how to get, how to get to..."
What is Sesame Street?