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Biology Ch 2 Questions

AB
Are lipids soluble in water?No
What composes lipids?Carbon, hydrogen, oxygen
Anything which has a mass and takes up spaceMatter
What are four subatomic particlesProton, Nuetron, Electron, Atomic Mass Unit
Positively charged in the nucleusProton
Uncharged in the nucleusNeutron
Particle distributed within a liquid, gas, solidSuspension
Proteins are structural materials for...Growth and Repair
Where do acids fall on the pH scale?Below 7
Chemical producing hydrogen ions in a water solutionAcid
Where do bases fall on the pH scale?Above 7
What # is considered neutral on pH scale?7
What are two types of componds?Inorganic and Organic
Large molecules formed when many monosaccharides bondPolyaccharides
What are the simplest carbohydrates?Monosacharides
What are 2 examples of carbohydrates?Sugars and starches
What is a main source of energy?Carbohydrates
Easily bonds to other compounds by forming chains or ringsBonds in organic compounds
What is a common solvent?Water
Orgnaic compounds that store energy fats and oilsLipids
Substances togther but not chemically combinedMixture
One substance dissolved into anotherSolution
When can compunds be formed?When atoms share electrons
contains two atoms of the same kindDiatomic molecules
The number that precedes a formula is calledA coefficient
What does a coefficent indicate?The # of molecules
How many elements are man made?14
Negatively charges; in constant motion around the nucleusElectron
How many elements occur naturally?92
Sodium has a positive ion. How is it written?Na +
Atomic Mass Unit =??Proton + neutron
When do isotopes occur naturally?@50
Chlorine has a negative ion. How is it written?Cl-
When was Dalton's Atomic Theory developed?1803
What are 3 parts of Dalton's atomic theory?1. Elements are composed of like atoms 2. Atomic Number. 3. Atomic Mass
What are the five most common elements found in the human bodt (in order)1. Hydrogen 2. Carbon 3. Nitrogen 4. Oxygen 5. Fluorine


Salem High School
Salem, IL

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