Textbook Question
We can be sure that a mole of table sugar and a mole of vitamin C are equal in theira. mass.b. volume.c. number of atoms.d. number of molecules.
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2. Cell Chemistry & Cell Components
Atoms- Smallest Unit of Matter
Back2. Cell Chemistry & Cell Components
Atoms- Smallest Unit of Matter
- Textbook QuestionThe reactivity of an atom arises froma. the average distance of the outermost electron shell from the nucleus.b. the existence of unpaired electrons in the valence shell.c. the sum of the potential energies of all the electron shells.d. the potential energy of the valence shell.1927views
- Textbook QuestionChanging the _________ would change it into an atom of a different element.a. number of electrons surrounding the nucleus of an atomb. number of protons in the nucleus of an atomc. electrical charge of an atomd. number of neutrons in the nucleus of an atom1966views
- Textbook QuestionAdd labels to the figure that follows, which illustrates the subatomic particles associated with a carbon atom.1742views
- Textbook QuestionElectrons .a. are negatively charged;b. along with neutrons make up the nucleus;c. are attracted to the negatively charged nucleus;d. are not involved in ionic bonds;e. all of the above are true1656views
- Textbook QuestionIn what way does the need for iodine or iron in your diet differ from your need for calcium or phosphorus?1494views
- Textbook QuestionDRAW IT Draw Lewis dot structures for each hypothetical molecule shown below, using the correct number of valence electrons for each atom. Determine which molecule makes sense because each atom has a complete valence shell and each bond has the correct number of electrons. Explain what makes the other molecule nonsensical, considering the number of bonds each type of atom can make. b.1771views
- Textbook QuestionDRAW IT Draw Lewis dot structures for each hypothetical molecule shown below, using the correct number of valence electrons for each atom. Determine which molecule makes sense because each atom has a complete valence shell and each bond has the correct number of electrons. Explain what makes the other molecule nonsensical, considering the number of bonds each type of atom can make. a.1734views
- Textbook QuestionUse carbon-12, the most common isotope of carbon, to define these terms: atomic number, mass number, valence. Which of these numbers is most related to the chemical behavior of an atom? Explain.2282views
- Textbook QuestionLook back at the abbreviated periodic table of the elements in Figure 2.5B. If two elements are in the same row, what do they have in common? If two elements are in the same column, what do they have in common? Would you predict that elements in the same row or the same column will have similar chemical properties? Explain.1632views
- Textbook Question
Which of the following statements correctly describes a solution?
a. In a solution the solute is chemically dissolved by the solvent.
b. Solutions involve large particles suspended in another component.
c. The particles in a solution will settle out if left to sit.
d. The amount of solute in a solution is expressed as the solution's concentration.
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Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
The mass number of an atom is the sum of its neutrons and protons.
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Match the following terms with the correct definition:
Endergonic reaction
Potential energy
Electrical energy
Anabolic reaction
Oxidation-reduction reaction
Chemical energy
Catabolic reaction
Kinetic energy
a. Energy in motion
b. Energy stored in chemical bonds
c. Reaction that consumes energy
d. A decomposition reaction
e. The energy of moving charged particles
f. Stored energy
g. Synthesis reaction
h. Reaction where electrons are transferred between reactants
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Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Protons and neutrons have a positive charge and electrons have a negative charge.
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Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Valence electrons are the electrons in the outermost shell of an atom.
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