Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 2, Problem 2RQ
Magnesium has an atomic number of 12. Which of the following statements is true of a neutral magnesium atom?
a. It has 12 protons, 12 electrons, and 12 neutrons.
b. It has 12 protons, 12 electrons, and six neutrons.
c. It has six protons, six electrons, and no neutrons.
d. It has six protons, six electrons, and six neutrons.
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A carbon atom contains six protons and six neutrons.A. What are its atomic number and atomic weight?B. How many electrons does it have?C. How many additional electrons must it add to fill its outermost shell? How does this affect carbon’s chemical behavior?D. Carbon with an atomic weight of 14 is radioactive. How does it differ in structure from nonradioactive carbon? How does this difference affect its chemical behavior?
Isotopes differ from each other only in the number of electrons they contain.
Select one:
a. True
b. False
The nucleus of an atom contains:
a.
neutrons and electrons
b.
protons and electrons
c.
protons only
d.
neutrons and protons
e.
neutrons only
Chapter 2 Solutions
Concepts of Biology
Ch. 2 - Figure 2.3 How many neutrons do (K) potassium-39...Ch. 2 - Magnesium has an atomic number of 12. Which of the...Ch. 2 - Which type of bond represents a weak chemical...Ch. 2 - An isotope of sodium (Na) has a mass number of 22....Ch. 2 - Which of the following statements is not true? a....Ch. 2 - Using a pH meter, you find the pH of an unknown...Ch. 2 - The pH of lemon juice is about 2.0, whereas tomato...Ch. 2 - An example of a monosaccharide is ________. a....Ch. 2 - Cellulose and starch are examples of______. a....Ch. 2 - Phospholipids are important components of_______....
Ch. 2 - The monomers that make up proteins are...Ch. 2 - Why are hydrogen bonds and van der Waals...Ch. 2 - Why can some insects walk on water?Ch. 2 - Explain why water is an excellent solvent.Ch. 2 - Explain at least three functions that lipids serve...Ch. 2 - Explain what happens if even one amino acid is...
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