Anatomy & Physiology (6th Edition)
6th Edition
ISBN: 9780134156415
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Textbook Question
Chapter 2.2, Problem 2CYU
An element has a mass of 207 and has 125 neutrons in its nucleus. How many protons and electrons does it have and where are they located?
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What if there are a different number of Neutrons?
Sometimes elements have a different number of neutrons than usual, so therefore have a different atomic mass. This is what we call an Isotope (a variant form of an element which has the same number of protons but a differing number of neutrons).
Sometimes we’ll see Isotopes labeled with their new mass like this:
14C = this is Carbon 14. Notice it has a different mass than what is on your periodic table
The average mass of all the isotopes is defined as an element’s Atomic Weight. Can you answer questions about these Isotopes?
ELEMENT
ATOMIC MASS
NUMBER OF PROTONS
NUMBER OF NEUTRONS
14C
A
B
C
15N
D
E
F
2H
G
H
I
Use your table to look up the number of protons, remember that never changes!
Iodine has 37 known isotopes. Therefore, the atomic mass has a range of 108-144 amu. Which of the following statements concerning iodine is correct?
A) The isotopes of iodine have between 55 and 91 protons.
B) An atom of iodine can have between 55 and 91 neutrons.
C) The isotopes of iodine will always have the same number of neutrons, but the protons can vary.
D) The isotopes of iodine have between 108 and 144 neutrons, but the number of protons will not vary.
According to chemist John Dalton, if one mole of nitrogen is combined with three moles of hydrogen to form one mole of ammonia (knowing that nitrogen, with an atomic number of 7, has an atomic mass of 14, and hydrogen, with an atomic number of 1, has an atomic mass of 1), then this compound will have an atomic weight (or molecular mass) of:
14 grams per mole (14 daltons)
17 grams per mole (17 daltons)
20 grams per mole (20 daltons)
22 grams per mole (22 daltons)
43 grams per mole (43 daltons)
Chapter 2 Solutions
Anatomy & Physiology (6th Edition)
Ch. 2.1 - What form of energy is found in the food we eat?Ch. 2.1 - What form of energy is used to transmit messages...Ch. 2.1 - What type of energy is available when we are...Ch. 2.2 - What two elements besides H and N make up the bulk...Ch. 2.2 - An element has a mass of 207 and has 125 neutrons...Ch. 2.2 - How do the terms atomic mass and atomic weight...Ch. 2.3 - What is the meaning of the term molecule?Ch. 2.3 - Why is sodium chloride (NaCl) considered a...Ch. 2.3 - Blood contains a liquid component and living...Ch. 2.4 - What kinds of bonds form between water molecules?
Ch. 2.4 - Oxygen (8O) and argon (18A) are both gases. Oxygen...Ch. 2.4 - Assume imaginary compound XY has a polar covalent...Ch. 2.5 - Which reaction type-synthesis, decomposition, or...Ch. 2.5 - Why are many reactions that occur in living...Ch. 2.5 - What specific name is given to decomposition...Ch. 2.6 - Salts are electrolytes. What does that mean?Ch. 2.6 - Which ion is responsible for increased acidity?Ch. 2.6 - To minimize the sharp pH shift that occurs when a...Ch. 2.6 - Prob. 19CYUCh. 2.7 - Prob. 20CYUCh. 2.8 - What are the monomers of carbohydrates called?...Ch. 2.8 - What is the animal form of stored carbohydrate...Ch. 2.9 - Prob. 23CYUCh. 2.10 - What does the name amino acid tell you about the...Ch. 2.10 - What is the primary structure of proteins?Ch. 2.10 - What are the two types of secondary structure in...Ch. 2.10 - How do enzymes reduce the amount of activation...Ch. 2.11 - How do DNA and RNA differ in the bases and sugars...Ch. 2.11 - What are two important roles of DNA?Ch. 2.12 - Glucose is an energy-rich molecule. So why do body...Ch. 2.12 - What change occurs in ATP when it releases energy?Ch. 2 - Which of the following forms of energy is the...Ch. 2 - All of the following are examples of the four...Ch. 2 - The mass number of an atom is (a) equal to the...Ch. 2 - A deficiency in this element can be expected to...Ch. 2 - Which set of terms best describes a proton? (a)...Ch. 2 - The subatomic particles responsible for the...Ch. 2 - Prob. 7MCCh. 2 - Which of the following does not describe a...Ch. 2 - In a beaker of water, the water-water bonds can...Ch. 2 - When a pair of electrons is shared between two...Ch. 2 - Molecules formed when electrons are shared...Ch. 2 - Which of the following covalently bonded molecules...Ch. 2 - Prob. 13MCCh. 2 - Factors that accelerate the rate of chemical...Ch. 2 - Prob. 15MCCh. 2 - Waters importance to living systems reflects (a)...Ch. 2 - Acids (a) release hydroxyl ions when dissolved in...Ch. 2 - Prob. 18MCCh. 2 - Prob. 19MCCh. 2 - A chemical has an amine group and an organic acid...Ch. 2 - Prob. 21MCCh. 2 - Enzymes are organic catalysts that (a) alter the...Ch. 2 - Define or describe energy, and explain the...Ch. 2 - Some energy is lost in energy energy conversion....Ch. 2 - Provide the atomic symbol for each of the...Ch. 2 - Consider the following information about three...Ch. 2 - How many moles of aspirin, C9H8O4, are in a bottle...Ch. 2 - Given the following types of atoms, decide which...Ch. 2 - What are hydrogen bonds and how are they important...Ch. 2 - Prob. 8SAQCh. 2 - Differentiate clearly between primary, secondary,...Ch. 2 - Prob. 10SAQCh. 2 - Describe the mechanism of enzyme action.Ch. 2 - Explain why, if you pour water into a glass very...
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- Elements have varying numbers of protons, neutrons, and electrons.True or false?arrow_forwardwhat subatomic particle is present in the nucleus of an atom?arrow_forwardfor the first 10 atoms from the periodic table determine: the atom full name and chemical symbol atomic number atomic mass how many protons, Neutrons and electrons? Abundance in naturearrow_forward
- An atomic nucleus can be described by the analogy “like a marble in the Dallas Cowboys Stadium.” If a marble represents the atomic nucleus, what does the stadium represent?arrow_forwardThe atomic mass of an element can be used to determine A) the chemical properties of the element B) the number of protons in the element C) the number of neutrons in the element D) the number of protons plus neutrons in the element E) both the number of protons and the chemical properties of the elementarrow_forwardAccording to chemist John Dalton, if one mole of oxygen is combined with two moles of hydrogen to form one mole of water (when hydrogen has an atomic number of 1 and an atomic mass of 1, and oxygen has an atomic number of 8 and an atomic mass of 16), then this compound has an atomic mass: of 42 grams per mole (42 daltons) of 38 grams per mole (38 daltons) of 32 grams per mole (32 daltons) of 20 grams per mole (20 daltons) of 18 grams per mole (18 daltons)arrow_forward
- Compared with 31P, the radioactive isotope 32P has(A) a different atomic number.(B) one more proton.(C) one more electron.(D) one more neutron.arrow_forwardWhat is the mass number of an ion with 107 electrons, 157 neutrons, and a +1 charge?arrow_forwarda) Identify the following as element (atomic or molecular), compound or mixture. b) Explain your reasoning and draw a sample of these substances containing 5 particles of that particular material. c) What would be the mass of 5 particles of that particular material? Show your work! H20 N2 C2HSOH Iodine gasarrow_forward
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