Exam 1 BIOL 1201 LSU-Pomarico
Accurate 100%
Chlorine has an electronegativity of 3.2, and carbon has an electronegativity of 2.6.
A compound composed of chlorine atoms and carbon atoms will most likely have
_____ bonds. - ANSWERpolar covalent
What is not a characteristic of life? - ANSWERmovement
The bonds between carbon and hydrogen in methane (CH4) are non-polar covalent
bonds. Therefore, methane is not very soluble in water. - ANSWERtrue
Isotopes of an element differ in the number of - ANSWERneutrons
Ammonia (NH3) takes part in hydrogen bonds. What does this tell you about
ammonia molecules? - ANSWERThe nitrogen atom in ammonia has a partially
negative charge, and the hydrogen atoms have a partially positive charge.
If an atom has 15 protons, 16 neutrons, and 12 electrons, the atomic number of the
atom is - ANSWER15
The most recent phylogenetic data suggests that bacteria and archaea may be more
closely related than archaea and eukarya. - ANSWERfalse
Non-polar substances are _____ because they have no charges and cannot interact
and hydrogen bond with water molecules. - ANSWERhydrophobic
How many bonds can carbon form? - ANSWER4
Which functional group is always found in either aldehydes or ketones? -
ANSWERcarbonyl
Which of the following is the first step in the scientific method? - ANSWERmake
observations
Potassium and sodium behave similarly in chemical reactions because -
ANSWERthey have the same number of valence electrons
By mass, most of the human body is composed of - ANSWERoxygen
Which functional group is C=O? - ANSWERcarbonyl
If the concentration of H+ ions in a solution is 1x10-8 moles per liter, then the
concentration of OH- ions in the same solution is 1x10-6 moles per liter. -
ANSWERtrue
Accurate 100%
Chlorine has an electronegativity of 3.2, and carbon has an electronegativity of 2.6.
A compound composed of chlorine atoms and carbon atoms will most likely have
_____ bonds. - ANSWERpolar covalent
What is not a characteristic of life? - ANSWERmovement
The bonds between carbon and hydrogen in methane (CH4) are non-polar covalent
bonds. Therefore, methane is not very soluble in water. - ANSWERtrue
Isotopes of an element differ in the number of - ANSWERneutrons
Ammonia (NH3) takes part in hydrogen bonds. What does this tell you about
ammonia molecules? - ANSWERThe nitrogen atom in ammonia has a partially
negative charge, and the hydrogen atoms have a partially positive charge.
If an atom has 15 protons, 16 neutrons, and 12 electrons, the atomic number of the
atom is - ANSWER15
The most recent phylogenetic data suggests that bacteria and archaea may be more
closely related than archaea and eukarya. - ANSWERfalse
Non-polar substances are _____ because they have no charges and cannot interact
and hydrogen bond with water molecules. - ANSWERhydrophobic
How many bonds can carbon form? - ANSWER4
Which functional group is always found in either aldehydes or ketones? -
ANSWERcarbonyl
Which of the following is the first step in the scientific method? - ANSWERmake
observations
Potassium and sodium behave similarly in chemical reactions because -
ANSWERthey have the same number of valence electrons
By mass, most of the human body is composed of - ANSWERoxygen
Which functional group is C=O? - ANSWERcarbonyl
If the concentration of H+ ions in a solution is 1x10-8 moles per liter, then the
concentration of OH- ions in the same solution is 1x10-6 moles per liter. -
ANSWERtrue
