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Practice Test
: Biology: Chapter 2 Vocabulary
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Cohesion
Buffer systems
Polar Covalent Bond
Radioactive isotopes (Radioisitope)
Atomic Number
Nonpolar covalent bond
Electrons
Unstable and tend to decay into more stable atoms.
They have a negative charge. there quantity is equal to that of the protons. They zip around the nucleus.
They help control the body's acid-base balance at levels suitable for life.
Because atoms are shared unequally, there is a slight difference in charge between the two poles of the bond; water is an example.
Atoms share electrons equally.
The number of protons in the nucleus of its atoms.
This means that something is showing a capacity to resist rupturing when it is streching, or placed under tension.
Short Answer
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Salt
Atoms
Hydrophobic
pH scale
Mixture
Multiple Choice
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Neutrons
They are a part of the nucleus; they are neurtal.
The scale is a way to measure the relative amount of hydrogen ions in solutes such as seawater, blood, or sap.
They are molecules that consist of two or more different elements in proportions that never do vary.
This means that something is showing a capacity to resist rupturing when it is streching, or placed under tension.
They are the smallest units that retain the properties of an element. All atoms are made up are made of three kinds subatomic particles: proteins, neutrons, and electrons.
Compounds
This means that something is showing a capacity to resist rupturing when it is streching, or placed under tension.
They are molecules that consist of two or more different elements in proportions that never do vary.
This bond is joined when atoms share one or more electrons.
A close association of ions by attraction of opposite charges.
Because atoms are shared unequally, there is a slight difference in charge between the two poles of the bond; water is an example.
Acids
hey are substances that donate hydrogen ions. (Acidic solutions have a pH below 7).
A close association of ions by attraction of opposite charges.
A dissolved substance.
An arrangement of elements based on their chemical properties.
They are the smallest units that retain the properties of an element. All atoms are made up are made of three kinds subatomic particles: proteins, neutrons, and electrons.
Evaporation
Heat energy converts liquid water to a gas.
This bond is joined when atoms share one or more electrons.
They are a part of the nucleus; they are neurtal.
An atom of a molecule interacts weakly with hydrogen atom already taking part in a polar covalent bond. These bonds impart structure to liquid water and stabilizes nucleic acids and other large molecules.
accept hydrongen ions when dissolved in water. (Basic solutions have a pH above 7).
Periodic Table
Atoms share electrons equally.
Polar molecules. Water loving substances.
An arrangement of elements based on their chemical properties.
An atom of a molecule interacts weakly with hydrogen atom already taking part in a polar covalent bond. These bonds impart structure to liquid water and stabilizes nucleic acids and other large molecules.
It carries a positive charge, or a defined amount of electricity. They are also part of the atomic nucleus. p+
True or False
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Covalent bond
A close association of ions by attraction of opposite charges.
True
False
Proton
Atoms share electrons equally.
True
False
Ionic Bond
A close association of ions by attraction of opposite charges.
True
False
Hydrophilic
An arrangement of elements based on their chemical properties.
True
False
Molecule
It is simplt two or more atoms of the same or different elements joined in a chemical bond.
True
False
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Practice Test: Biology: Chapter 2 Vocabulary