BIOD27H3 Chapter 2: Chapter Notes for Chapter 2 of Human Physiology 5e

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whiteotter147

25 Jun 2011

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Document Summary

atoms: building blocks of all matter, composed of protons (+ charge), electrons (- charge), and neutrons (uncharged), most of an atom"s volume is empty space. The protons and neutrons of the atom are clustered in the nucleus, electrons, which are held in their orbits by their attraction to the protons, are contained in the space around the nucleus. molecules: two or more atoms linked by sharing electrons, most molecules are compounds (contain more than one element) bonds: transfer or sharing of electrons between atoms www. notesolution. com: strong bonds: covalent, ionic, weak bonds: hydrogen, van der waals. electron pairs in covalent bonds are not always shared evenly. nonpolar molecule: molecule with evenly shared electrons: hydrophobic: water-hating; do not dissolve well. hydrogen bonds and van der waals forces are weak interactions. Between atoms: hydrogen bond: weak attractive force between a hydrogen and nearby oxygen/nitrogen/fluorine atom. atoms attracted by vdw keep moving closer together until they repel.

Related Questions

5. ______ is the basic unit of all elements of a matter.
6. An atom that contains fewer electrons than protons is said to be _______ charge.
7. A particle that contains more electrons than protons is ______ charge.
8. If an atom contains equal numbers of electrons and protons, the atoms are described as _______.

a. atom b. electrically neutral

c. electron d. negatively

e. neutron f. nucleus

g. positively h. proton

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1. (TCO 1) Control subjects in a double-blindtest of a new drug are (Points : 4) informed of what drug they aregetting.
informed of what drug they aregetting but their private physicians are not.
given larger doses of thedrug.
infected with a differentdisease than the experimental subjects.
not given the experimentaldrug but are otherwise treated the same as the experimentalsubjects.

Question 2. 2. (TCO 1) My dog will eat more ofher food when I pour bacon grease over the food before I give it toher. This is an example of a(n) _____. (Points : 4)

observation
hypothesis
experiment
theory
All of the above

Question 3. 3. (TCO 1) Deductive reasoning isused to make _____ based on a hypothesis. (Points : 4)

data
theories
statistical tests
correlations
predictions

Question 4. 4. (TCO 2) Which of the followingstatements about the periodic table is incorrect? (Points : 4)

A period is a horizontal rowon the periodic table.
A group is a column on theperiodic table.
The elements in each periodhave similar chemical properties.
The A groups contain therepresentative elements.
The B groups contain thetransition elements.

Question 5. 5. (TCO 2) How do you find themass number of an atom? (Points : 4)

Add up the number of protons,electrons, and neutrons in the atom.
Add up the number of protonsand neutrons in the atom.
It is equal to the number ofprotons in the atom.
It is equal to the number ofneutrons in the atom.
Find the net electrical chargeof the atom.

Question 6. 6. (TCO 2) An isotope of potassiumhas a mass number of 39. How many neutrons are present in thisisotope? (Points : 4)

19
20
24
44
58

Question 7. 7. (TCO 2) Which particles arefound in the nucleus of an atom? (Points : 4)

Only neutrons
Protons and electrons
Protons and neutrons
Only electrons
Only protons