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문제 19c
The radius of an atom of gold (Au) is about 1.35 Å. c. If the atom is assumed to be a sphere, what is the volume in cm3 of a single Au atom?
문제 20a
An atom of rhodium (Rh) has a diameter of about 2.7×10−8 cm. a. What is the radius of a rhodium atom in angstroms (Å) and in meters (m)?
문제 20c
An atom of rhodium (Rh) has a diameter of about 2.7×10−8 cm. c. If you assume that the Rh atom is a sphere, what is the volume in m3 of a single atom?
- Answer the following questions without referring to Table 2.1: (a) What are the main subatomic particles that make up the atom? (b) What is the relative charge (in multiples of the electronic charge) of each proton? (b) What is the relative charge (in multiples of the electronic charge) of each neutron? (b) What is the relative charge (in multiples of the electronic charge) of each electron? (c) Which of the particles is the most massive? (d) Which is the least massive?
문제 21
문제 22a
Determine whether each of the following statements is true or false. a. The nucleus has most of the mass and comprises most of the volume of an atom.
문제 22b
Determine whether each of the following statements is true or false. b. Every atom of a given element has the same number of protons.
문제 22c
Determine whether each of the following statements is true or false. c. The number of electrons in an atom equals the number of neutrons in the atom.
문제 22d
Determine whether each of the following statements is true or false. d. The protons in the nucleus of the helium atom are held together by a force called the strong nuclear force.
문제 23a
Consider an atom of 10B. (a) How many protons, neutrons, and electrons does this atom contain?
문제 23b
Consider an atom of 10B. (b) What is the symbol of the atom obtained by adding one proton to 10B?
문제 23c
Consider an atom of 10B. (c) What is the symbol of the atom obtained by adding one neutron to 10B?
문제 23d
Consider an atom of 10B. (d) Are either of the atoms obtained in parts (b) and (c) isotopes of 10B? If so which one?
문제 24a
Consider an atom of 63Cu. (a) How many protons, neutrons, and electrons does this atom contain?
문제 24b
Consider an atom of 63Cu. b. What is the symbol of the ion obtained by removing two electrons from 63Cu?
문제 24c
Consider an atom of 63Cu. (c) What is the symbol for the isotope of 63Cu that possesses 36 neutrons?
문제 25a
(a) Define atomic number and mass number.
문제 25b
(b) Which of these can vary without changing the identity of the element?
문제 26a
(a) Which two of the following are isotopes of the same element: 3116X, 3115X, 3216X?
문제 26b
(b) What is the identity of the element whose isotopes you have selected?
문제 27a,b,c
How many protons, neutrons, and electrons are in the following atoms? (a) 84Kr (b) 200Hg (c) 70Ga
문제 27d
How many protons, neutrons, and electrons are in the following atoms? (d) 80Br
문제 27e,f
How many protons, neutrons, and electrons are in the following atoms? (e) 184W (f) 181Ta.
- Each of the following isotopes is used in medicine. Indicate the number of protons and neutrons in each isotope: (a) samarium-153 (b) lutetium-177 (c) bismuth-213 (d) molybdenum-99 (e) lead-212 (f) caesium-131.
문제 28
문제 29a,b
Fill in the gaps in the following table, assuming each column represents a neutral atom.
Symbol 79Br
Protons 25 82
Neutrons 30 64
Electrons 48 86
Mass no. 222 207
Complete the first row of the table excluding the isotope symbol.
Complete the second row of the table excluding the row with isotope symbol.
문제 29c
Fill in the gaps in the following table, assuming each column represents a neutral atom.
Symbol 79Br
Protons 25 82
Neutrons 30 64
Electrons 48 86
Mass no. 222 207
Complete the third row of the table.
문제 29d
Fill in the gaps in the following table, assuming each column represents a neutral atom.
Symbol 79Br
Protons 25 82
Neutrons 30 64
Electrons 48 86
Mass no. 222 207
Complete the fourth row of the table.
문제 29e
Fill in the gaps in the following table, assuming each column represents a neutral atom.
Symbol 79Br
Protons 25 82
Neutrons 30 64
Electrons 48 86
Mass no. 222 207
Complete the fifth row of the table.
문제 30a
Fill in the gaps in the following table, assuming each column represents a neutral atom.
Symbol 112Cd
Protons 38 92
Neutrons 58 49
Electrons 38 36
Mass no. 81 235
Complete the first row of the table.
문제 30b
Fill in the gaps in the following table, assuming each column represents a neutral atom.
Symbol 112Cd
Protons 38 92
Neutrons 58 49
Electrons 38 36
Mass no. 81 235
Complete the second row of the table.
문제 30c,d
Fill in the gaps in the following table, assuming each column represents a neutral atom.
Symbol 112Cd
Protons 38 92
Neutrons 58 49
Electrons 38 36
Mass no. 81 235
Complete the third row of the table.
Complete the fourth row of the table.