Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Question
Chapter 2, Problem 3FIB
Summary Introduction
Introduction:
The smallest unit of an element is called as an atom. An atom comprised of “protons, neutrons, and electrons”. The whole charge of an atom is neutral, because of the presence of positively charged particles called as proton and negatively charged particles called as electrons.
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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 shell
The nucleus of an atom contains:
a.
neutrons and electrons
b.
protons and electrons
c.
protons only
d.
neutrons and protons
e.
neutrons only
The atomic number of an atom is determined by the number of in the atom. (a) protons
(b) neutrons
(c) electrons
(d) electrons plus neutrons plus protons
Chapter 2 Solutions
Biology
Ch. 2.1 - What is the mass number of hydrogen? Of helium?Ch. 2.1 - Unstable Atoms Unleashed Because exposure to...Ch. 2.1 - Prob. 2TCCh. 2.1 - What causes the coals of a campfire to glow?Ch. 2.1 - In addition to lower brain activity, what other...Ch. 2.1 - define clement and atom?Ch. 2.1 - Prob. 2CYLCh. 2.1 - explain atomic number and mass number?Ch. 2.1 - explain radioactivity and its dangers and...Ch. 2.1 - describe electron shells?
Ch. 2.2 - At a physical exam, Thomas, a sedentary...Ch. 2.2 - Prob. 1CYLCh. 2.2 - Prob. 2CYLCh. 2.2 - explain atomic number and mass number?Ch. 2.3 - The slap of a belly flop provides firsthand...Ch. 2.3 - Prob. 1TCCh. 2.3 - Predict how a drop of water on an oil-coated...Ch. 2.3 - Prob. 3TCCh. 2.3 - Prob. 1CYLCh. 2.3 - Prob. 2CYLCh. 2.3 - explain atomic number and mass number?Ch. 2.3 - Prob. 1CTCh. 2 - Which of the following is false? a. An dement is...Ch. 2 - Prob. 2MCCh. 2 - Isotopes are defined as a. atoms of the same...Ch. 2 - Prob. 4MCCh. 2 - Prob. 5MCCh. 2 - An atom consists of an atomic nucleus composed of...Ch. 2 - An atom that has lost or gained one or more...Ch. 2 - Prob. 3FIBCh. 2 - Prob. 4FIBCh. 2 - Water is described as __________ because each...Ch. 2 - Prob. 1RQCh. 2 - Distinguish between atoms and molecules and among...Ch. 2 - Prob. 3RQCh. 2 - Prob. 4RQCh. 2 - Prob. 5RQCh. 2 - Prob. 6RQCh. 2 - Prob. 7RQCh. 2 - Detergents help clean by dispersing fats and oils...Ch. 2 - Prob. 2ACCh. 2 - Prob. 3AC
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Similar questions
- Atoms that vary in the number of neutrons found in their nuclei are called _____________. ions neutrons neutral atoms isotopesarrow_forwardWhat atom has only one proton? a. hydrogen c. a free radical b. an isotope d. a radioisotopearrow_forwardAn isotope of sodium (Na) has a mass number of 22. How many neutrons does it have? a. 11 b. 12 c. 22 d. 44arrow_forward
- A. 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_forwardMagnesium 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_forward
- The mass number of an atom depends primarily on the number of protons and neutrons. positrons. neutrons and electrons. protons and electrons.arrow_forwardElement Atomic Number Mass Number Number of Protons Number of Neutrons Number of Electrons Carbon-12 12 6 Nitrogen-14 7 7 Chlorine-35 35 17 Oxygen-16 8 Carbon-14arrow_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
- The atomic mass number of an atom is determined by the sum of the number of in the atom. (a) protons plus electrons plus neutrons (b) protons plus electrons (c) neutrons plus electrons (d) neutrons plus protonsarrow_forwardWhich 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 energyarrow_forwardAtoms of the same element that differ only in the number of neutrons are known asarrow_forward
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