Chemistry Test 2- The Structure Of The Atom 1

25 July 2022
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question
Carbon-12 and carbon-13 are isotopes of carbon. Which of the following statements is correct? A. They both have seven protons in the nucleus. B. They both have the same mass number. C. They both have seven neutrons in the nucleus. D. They both have the same atomic number.
answer
D. They both have the same atomic number.
question
The mass number of Fe2+ is 56. How many neutrons are there in a single Fe2+ atom? A. 28 B. 30 C. 56 D. 58
answer
B. 30
question
A particle that orbits the nucleus in an atom is called a(n) _____________.
answer
Electron
question
An atom contains one proton, one electron, and one neutron. Which two particles are most similar in mass? A. the neutron and the electron B. the proton and the electron C. the proton and the neutron D. the neutron and the atom
answer
C. The proton and the neutron
question
The diagram below is an artist's impression of a single atom of element Be. The neutrons are shown with stripes, the protons are gray, and the electrons are black. These particles are not drawn to scale. Which element below could be an isotope of this atom? A. sodium-10 B. beryllium-10 C. boron-9 D. carbon-9
answer
B. Beryllium- 10
question
Which two particles are found in the nucleus of an atom? A. neutrons and electrons B. protons and electrons C. protons and neutrons D. neutrons and atoms
answer
C. Protons and neutrons
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What is the charge on an electron? A. -1 B. 0 C. +1 D. +2
answer
A. -1
question
Boron occurs naturally as two isotopes. What is the difference between these isotopes? A. They have different numbers of electrons and different charges. B. They have different numbers of neutrons and different charges. C. They have different numbers of protons and different mass numbers. D. They have different numbers of neutrons and different mass numbers.
answer
D. They have different numbers of neutrons and different mass numbers.
question
The table below gives some characteristics of element Y. Characteristics of element Y Values Mass number 11 Number of neutrons in a single atom 6 Average atomic mass (grams/mole) 10.81 What is the identity of element Y? A. C B. B C. Na D. S
answer
B. B
question
Which element has 16 protons in its nucleus? A. neon B. oxygen C. sodium D. sulfur
answer
D. Sulfur
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A lithium atom has three protons, three neutrons, and three electrons. What is the overall charge on this atom? A. -3 B. 0 C. +1 D. +3
answer
B. 0
question
Which statement describes an electron? A. It has a positive charge and is located in the nucleus. B. It has a positive charge and is located in orbitals around the nucleus. C. It has a negative charge and is located in the nucleus. D. It has a negative charge and is located in orbitals around the nucleus.
answer
D. It has a negative charge and is located in orbitals around the nucleus.
question
In which of these statements are protons, electrons, and neutrons correctly compared? A. Quarks are present in protons and neutrons but not in electrons. B. Quarks are present in protons, neutrons, and electrons. C. Quarks are present in neutrons and electrons but not in protons. D. Quarks are present in protons and electrons but not in neutrons.
answer
A. Quarks are present in protons and neutrons but not in electrons.
question
The table below gives the atomic mass and relative abundance values for the three isotopes of element M. Relative abundance (%) Atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 What is the average atomic mass (in amu) of element M? A. 2.86 B. 5.36 C. 24.30 D. 24.98
answer
D. 24.98
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A nitride ion has 7 protons, 8 neutrons, and 10 electrons. What is the overall charge on this ion? A. -3 B. -2 C. 0 D. +3
answer
A. -3
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The table below gives the numbers of protons, electrons, and neutrons in four atoms. Atom Number of protons Number of neutrons Number of electrons 1 9 8 9 2 9 9 8 3 9 9 10 4 9 10 9 Based on the table, which atom has a charge of -1? A. 1 B. 2 C. 3 D. 4
answer
C. 3
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A scientist uses an accelerator and high energy electrons to study the particles inside the protons of a helium atom. What particles is the scientist studying? A. the He neutrons B. the He nucleus C. the He electrons D. the He quarks
answer
D. The He quarks
question
The diagram below shows some subatomic particles. mc007-1.jpg What is the particle that is labeled with a question mark (?) in the diagram? A. beta particle B. quark C. isotope D. alpha particle
answer
B. Quark