Multiple Choice
A proton ___________:
58
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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 Question
Isotopes of an element differ from each other in the number of
(a) Protons in the nucleus
(b) Neutrons in the nucleus
(c) Electrons in the outer shells
(d) a, b, and c are all correct
1views - Textbook Question
The subatomic particle with the least mass
(a) Carries a negative charge
(b) Carries a positive charge
(c) Plays no part in the atom's chemical reactions
(d) Is found only in the nucleus
2views - Multiple ChoiceWhat are the six most important chemical elements of life?4views
- 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.4views
- 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.3views
- Multiple Choice
How many valence electrons does an atom with five total electrons have?
23views - Multiple ChoiceWhich of the following molecules is most abundant in the cells of the human body?
- 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.10views
- Textbook QuestionWe 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.20views1rank
- Multiple ChoiceWhich of the following is a trace element?9views
- Multiple ChoiceIf you were told that concentrations of trace elements above what is required by organisms generally have no effect on those organisms, what would you say?7views
- Textbook Question
Important functions of water include which of the following?
a. Provides cushioning
b. Acts as a transport medium
c. Participates in chemical reactions
d. Acts as a solvent for sugars, salts, and other solutes
e. Reduces temperature fluctuations
1views - Multiple ChoiceThe number of protons in an uncharged atom __________.9views
- Multiple ChoiceWhat are the four most abundant elements found in living systems?6views