Ch 2 Mastering Biology
What is the mass number of an ion with 109 electrons, 157 neutrons, and a +1 charge?
267
anti-
against
tri-
three
ad-
to
-phob
to fear
-phil
to love
di-
two
hydro-
water
co-
with or together with
prim-
first
proto-
first
An atom with atomic number 12 would have what type of chemical behavior in bonding with other elements? A) It would form ions with a -2 charge. B) It would form ions with a -1 charge. C) It would form two covalent bonds with other atoms. D) It would form ions with a +2 charge. E) It would form ions with a +1 charge.
D
What name is given to the bond between water molecules? A) ionic B) hydrophobic C) polar covalent D) hydrogen E) single (nonpolar) covalent
D
-lysis
loosening, split apart
An atom with 4 valence electrons in its outer shell can form up to _____ single covalent bond(s). A) 4 B) 2 C) 1 D) 0 E) 3
A
Atoms with the same number of protons but with different electrical charges _____. A) are different ions B) have different numbers of neutrons C) are different isotopes D) have different atomic masses E) have different atomic numbers
A
Changing the number of _____ would change an atom into an atom of a different element. A) protons in an atom B) bonds formed by an atom C) electrons circling the nucleus of an atom D) particles in the nucleus of an atom E) neutrons in an atom
A
In salt, what is the nature of the bond between sodium and chlorine? A) ionic B) hydrogen C) hydrophobic D) nonpolar covalent E) polar covalent
A
What bonding or interaction is most likely to occur among a broad array of molecules of various types (polar, nonpolar, hydrophilic, hydrophobic)? A) van der Waals interactions B) covalent bonding C) polar covalent bonding D) hydrogen bonding E) ionic bonding
A
2 atoms sharing 2 electrons form what kind of bond? A) ionic B) single (nonpolar) covalent C) double (nonpolar) covalent D) hydrogen E) polar covalent
B
A(n) _____ bond joins two oxygen atoms together A) ionic B) double covalent C) single covalent D) quadruple covalent E) hydrogen
B
An ionic bond involves _____. A) water avoidance B) an attraction between ions of opposite charge C) the sharing of a single pair of electrons D) no atoms other than sodium and chlorine E) the unequal sharing of an electron pair
B
One difference between carbon-12 (126C) is that carbon-14 (146C) has A) two more electrons than carbon-12. B) two more neutrons than carbon-12. C) two more electrons and two more neutrons than carbon-12. D) two more protons and two more neutrons than carbon-12. E) two more protons than carbon-12.
B
(Refer to a periodic table) If life arose on a planet where carbon atoms were absent, which element might fill the role of carbon? A) nitrogen B) boron C) silicon D) phosphorus E) aluminum
C
A substance that cannot be broken down into other substances by ordinary chemical procedures is a(n) _____. A) isotope B) molecule C) element D) proton E) compound
C
A(n) _____ refers to two or more atoms held together by covalent bonds. A) community B) ion C) molecule D) shell E) isotope
C
About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of living matter? A) carbon, oxygen, nitrogen, calcium B) oxygen, hydrogen, calcium, nitrogen C) carbon, hydrogen, nitrogen, oxygen D) carbon, sodium, hydrogen, nitrogen E) carbon, oxygen, phosphorus, hydrogen
C
How many neutrons are present in the nucleus of a phosphorus-32 (32P) atom? (Refer to a periodic table) A) 5 B) 32 C) 17 D) 16 E) 15
C
Hydrogen bonding is most often seen _____. A) when multiple carbon atoms are present B) if the molecule consists of three or fewer atoms C) when hydrogen is covalently bonded to an electronegative atom D) when the bonds within the molecule are nonpolar covalent bonds E) in molecules whose three-dimensional shape is tetrahedral
C
When an Na (Sodium) molecule gives an electron to a Cl (Chlorine) molecule, what has occurred? A) a positively charged sodium ion and a positively charged chlorine ion B) a negatively charged sodium ion and a negatively charged chlorine ion C) a positively charged sodium ion and a negatively charged chlorine ion D) covalent bond formation E) a negatively charged sodium ion and a positively charged chlorine ion
C
The nucleus of a nitrogen atom contains 7 neutrons and 7 protons. Which of the following is a correct statement concerning nitrogen? A) The nitrogen atom has a mass number of approximately 7 and an atomic number of 14. B) The nitrogen atom has a mass number of approximately 14 and an atomic number of 14. C) The nitrogen atom has a mass number of approximately 14 and an atomic number of 21 D) The nitrogen atom has a mass number of approximately 7 and an atomic number of 21. E) The nitrogen atom has a mass number of approximately 14 and an atomic number of 7.
E
We can represent atoms by listing the number of protons, neutrons, and electrons-for example, 2p +, 2n 0, 2e - for helium. Which of the following represents the 18O isotope of oxygen? A) 6p +, 8n 0, 6e - B) 7p +, 2n 0, 9e - C) 9p +, 9n 0, 9e - D) 10p +, 8n 0, 9e - E) 8p +, 10n 0, 8e -
E
What bond lies between a Hydrogen atom of a water molecule and an oxygen atom of another water molecule? A) ionic B) single (nonpolar) covalent C) polar covalent D) hydrophobic E) hydrogen
E
What results from an unequal sharing of electrons between atoms? A) an ionic bond B) a nonpolar covalent bond C) a hydrogen bond D) a hydrophobic interaction E) a polar covalent bond
E
What type of bond joins 2 hydrogens together? A) hydrogen B) hydrophilic C) ionic D) hydrophobic E) covalent
E
Which of the following is a trace element required by most living organisms? A) nitrogen B) oxygen C) carbon D) hydrogen E) magnesium
E
In the bonding of H2O, which atoms are slightly negatively charged and which atoms are slightly positively charged?
The Hydrogens will be positive, the Oxygen will be negative because Oxygen has a higher electronegativity and "hogs" the electrons
iso-
equal
lip-
fat
quad- or quat-
four
de-
from, out of, remove
poly-
many
non-
not
neutr-
of neither gender or type
mono-
single
