BIOL 1107 Study Guide - Midterm Guide: Hydrogen Bond, Atomic Number, Chemical Bond

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orchidlocust478

11 Oct 2015

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Document Summary

Chapter 2 - the chemical basis of life. Elements and compounds: a compound is an entity consisting of two or more different atoms which associate via chemical bonds. Atoms and molecules: atomic structure goes beyond a simple two-dimensional drawing. There are primary, secondary, tertiary, and quaternary levels that distinctly define an atoms function: a. ) Neurons and protons can be found in the nucleus of an atom. Neurons have no electrical charge while protons have a positive electrical charge. The atomic number is defined by the number of protons an atom contains. The mass number is the sum of the protons and neutrons. C. ) the atomic weight is the average of all of the mass numbers found in a the various isotopes of a given element: the atomic number is the number of protons in a nucleus. The mass number is the number of protons and neutrons in a nucleus.

Related Questions

1. An ionic bond between two atoms is formed as a result of the ______________.

a) sharing of electrons

b)transfer of electrons from one atom to the other.

c) loss of electrons from both atoms.

d) loss of a proton from one atom

2. Choose the phrase that best completes this sentence: Microtubules ____________ and are required to pull duplicated chromosomes to opposite poles of dividing cells.

a)generate contractile forces

b)are intermediate in thickness

c)are found in especially large numbers in muscle cells

d)can rapidly reorganize

3. Which subatomic particles contribute to the atomic number for any given element?

a)protons

b)neutrons

c)protons and electrons

d)protons and neutrons

ATOMIC STRUCTURE

1. A neutral oxygen atom (atomic number = 8) has 8 electronslocated in 2 different electron orbitals. TrueFalse

2. Hydrogen has only one neutron and no protons in itsnucleus. TrueFalse
3. An atom consists of a central nucleus surrounded by electronsthat are in constant motion. TrueFalse
4. Almost all of the mass of an atom is concentrated in itselectrons. TrueFalse
5. The orbital of an electron is the volume of space where theelectron is most likely to be found. TrueFalse
6. Almost all of the volume of an atom is emptyspace. TrueFalse
7. The reactivity or chemical behavior of an atom depends primarilyon the number of neutrons it has. TrueFalse
8. Modern physics indicates that we cannot determine the exactlocation of a particular electron at any giventime. TrueFalse
9. Electrons are maintained in their orbitals by their attractionto the positively charged nucleus. TrueFalse
10. Atomic orbitals represent probability distributions forelectrons and come in a variety of shapes. TrueFalse

aquamarineoyster686

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