Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
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 smallest particle of an element that still has the chemical characteristics of that element is a(n)a. electron. c. neutron. e. atom.b. molecule. d. proton.
What is a proton?
A. A negatively charged particle
B. A positively charged particle
C. An element on the periodic table
D. Any particle found in the nucleus
Chapter 2 Solutions
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_forwardAtoms 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_forwardThe 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.arrow_forward
- What atom has only one proton?a. hydrogen d. a free radicalb. an isotope e. a radioisotopec. helium f. oxygenarrow_forwardIsotopes differ from each other only in the number of electrons they contain. Select one: a. True b. Falsearrow_forwardA substance that has weight and occupies space is calleda. kinetic energy.b. a catalyst.c. matter.d. potential energy.arrow_forward
- The nucleus of an atom contains: a. neutrons and electrons b. protons and electrons c. protons only d. neutrons and protons e. neutrons onlyarrow_forwardWhich 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_forwardWhich of the following molecules generally possesses a complex shape that allows the molecule to function as tools and machinery that essentially do all the work within a living cell? 20. A. triglycerides B. proteins C. carbohydrate D. A and B are correct.arrow_forward
- Chemical reactions that take place in living systems include A. Neutralization reaction B. Condensation reaction C. Hydrolysis reaction D. All the abovearrow_forwardif we want to find out which element are safe for humans to consume when combined as a salt then which of the following might be the best way to predict the elements that are safest to eat?arrow_forwardIsotopes differ in theira. number of protons.b. atomic number.c. number of neutrons.d. number of electrons.arrow_forward
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