MindTap Biology, 1 term (6 months) Printed Access Card for Starr/Taggart/Evers/Starr's Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305269842
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 2, Problem 3SQ
Summary Introduction
Introduction: Atoms are the smallest unit of all matter that has the chemical properties. Atom has negatively charged electrons, positively charged protons, and uncharged neutrons.
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Which of the following statements is incorrect? a. Isotopes have the same atomic number and different mass numbers. b. Atoms have about the same number of electrons as protons. c. All molecules consist of atoms. d. Free radicals are dangerous because they emit energy
The atomic number gives thea. number of neutrons in the nucleus.b. number of protons in the nucleus.c. weight of the atom.d. number of protons in the valence shell.
Which statement is false?
A. Elements are found in compounds and molecules
B. compounds are made of elements
C. a molecule must be made of at least two atoms
D. chemical bonds form between molecules of solute and solvent
E. two atoms of oxygen make a molecule of oxygen
Chapter 2 Solutions
MindTap Biology, 1 term (6 months) Printed Access Card for Starr/Taggart/Evers/Starr's Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 2 - What atom has only one proton? a. hydrogen b. an...Ch. 2 - A molecule into which a radioisotope has been...Ch. 2 - Prob. 3SQCh. 2 - Prob. 1DAACh. 2 - Mercury Emissions by Continent By weight, coal...Ch. 2 - Prob. 3DAACh. 2 - Prob. 4DAACh. 2 - Prob. 4SQCh. 2 - Prob. 5SQCh. 2 - The measure of an atoms ability to pull electrons...
Ch. 2 - The mutual attraction of opposite charges holds...Ch. 2 - Atoms share electrons unequally in a(n) ________...Ch. 2 - A(n) ________ substance repels water. a. acidic b....Ch. 2 - Prob. 10SQCh. 2 - Prob. 11SQCh. 2 - When dissolved in water, a(n) ________ donates H+;...Ch. 2 - A ________ can help keep the pH of a solution...Ch. 2 - Prob. 14SQCh. 2 - Prob. 15SQCh. 2 - Alchemists were medieval scholars and philosophers...Ch. 2 - Draw a shell model of a lithium atom (Li), which...Ch. 2 - Polonium is a rare element with 33 radioisotopes....Ch. 2 - Some undiluted acids are not as corrosive as when...
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- Miller and Urey created a reaction chamber that simulated conditions in Earths early atmosphere to test the hypothesis that______. a. lightning-fueled atmospheric reactions could have produced organic compounds b. meteorites contain organic compounds c. organic compounds form at hydrothermal vents d. oxygen prevents formation of organic compoundsarrow_forwardWhat is an alloy? A. A compound of two metals B. An element of two metals C. A mixture of two metals D. A molecule of two metalsarrow_forwardWhich is true about carbon atoms? a. Each of the orbitals in the second shell has one electron in it. b. Only the 2p orbitals have unpaired electrons c. Carbon has high electronegativity d. Carbon binds hydrogen with polar covalent bondsarrow_forward
- Atoms are incredibly tiny, so small that most microscopes can't even see them, but atoms themselves are made of even smaller particles: protons, neutrons, and electrons. Which of the following describes where protons are located in an atom? A. A shell B. The nucleus C. Both the nucleus and a shellarrow_forwardStanley Miller and Harold Urey performed an experiment by recreating in the laboratory the probable conditions of the atmosphere of the primitive earth.(i) What was the aim of the experiment?(ii) In what forms was the energy supplied for chemical reactions to occur?(III) For how long was the experiment run continuously? Name two products formed.arrow_forwardEnzymes are organic catalysts that (a) alter the direction in which a chemical reaction proceeds, (b) determine the nature of the products of a reaction, (c) increase the speed of a chemical reaction, (d) are essential raw materials for a chemical reaction that are converted into some of its products.arrow_forward
- 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.arrow_forwardAlchemists were the forerunners of modern-day chemists. Many of these medieval scholars and philosophers spent their lives trying to transform lead (atomic number 82) into gold (atomic number 79). Explain why they never succeeded.arrow_forwardWhat atom has only one proton? a. hydrogen c. a free radical b. an isotope d. a radioisotopearrow_forward
- Which of the following statements is not true? a. Water is polar. b. Water stabilizes temperature. c. Water is essential for life. d. Water is the most abundant atom in Earth’s atmosphere.arrow_forwardA. The first shell corresponds to the first energy level, and it can hold up to 2 electrons. Hydrogen has one proton, so it has 1 electron and one vacancy. A helium atom has 2 protons, 2 electrons, and no vacancies. B. The second shell corresponds to the second energy level, and it can hold up to 8 electrons. Carbon has 6 electrons, so its first shell is full. Its second shell has 4 electrons and four vacancies. Oxygen has 8 electrons and two vacancies. Neon has 10 electrons and no vacancies. C. The third shell corresponds to the third energy level, and it can hold up to 8 electrons. A sodium atom has 11 electrons, so its first two shells are full; the third shell has one electron. Thus, sodium has seven vacancies. Chlorine has 17 electrons and one vacancy. Argon has 18 electrons and no vacancies. Figure It Out: Which of these models have unpaired electrons in their outer shell?arrow_forwardThe nucleus of an atom contains: a. neutrons and electrons b. protons and electrons c. protons only d. neutrons and protons e. neutrons onlyarrow_forward
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