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Topic 3 - The Atomic Structure
20. Ground and excited state: Recognizing and interpreting ground and excited state
configurations:
1. What is the electron configuration of a sulfur atom in the ground state?
1) 2 – 4 2) 2 – 6 3) 2 – 8 – 4 4) 2 – 8 – 6
2. Which electron configuration represents an atom of lithium in an excited state?
1) 1 – 1 2) 1 – 2 3) 2 – 1 4) 2 – 2
3. Which electron configuration could represent a strontium atom in the excited state?
4) 2 – 8 – 18 – 8 – 2
1) 2 – 8 – 18 – 7 – 1
2) 2 – 8 – 18 – 7 – 3 3) 2 – 8 – 18 – 8 – 1
4. An atom has 16 protons and 16 electrons. Which is the electron configuration of this atom in the
excited state?
1) 2–18–8–4 2) 2–8–6 3) 2–18–8–8–3–1 4) 2–8–5–1
5. Atom X has 8 protons and 8 electrons. Which configuration shows this atom in the excited state?
Teacher Preview Copy
Teacher Preview Copy
1) 2 – 6 2) 1 – 7 3) 2 – 8 – 6 4) 2 – 8 – 8
6. Which is a configuration of an atom in the excited state? 4) 2 – 1 – 2
2) 2 – 8 – 3
3) 2 – 8
1) 2 – 8 – 1
7. Which configuration shows an atom in the excited state? 4) 2 – 8 – 1
1) 2- 8 – 7 - 8
3) 2
2) 2 – 8 – 8
8. The electron configuration 2 – 8 – 2 is of
1) Sodium atom in the ground state 3) Magnesium atom in the ground state
2) Sodium atom in the excited state 4) Magnesium atom in the excited state
9. The electron configuration 2 – 8 – 5 – 1 is of 3) Sulfur atom in the ground state
1) Oxygen atom in the ground state
2) Oxygen atom in the excited state 4) Sulfur atom in the excited state
10. The electron configuration 2 – 8 – 18 – 2 – 1 is of
1) Ga atom in the excited state 3) Al atom in the excited state
4) Al atom in the ground state
2) Ga atom in the ground state
21. Neutral atoms and ion Recalling concept facts and definitions
1. An atom with equal number of protons to electrons are called
1) Positive ion 2) Negative ion 3) Neutral atom 4) Isotope
2. What type of particle contains more protons than electrons?
1) A neutral atom 2) A Positive ion 3) A negative ion 4) An isomer
3. An atom that contains less electrons than protons is called 4) A negative ion
1) A neutral atom
2) An alpha particle
3) A Positive ion
4. A neutral atom must have the same number of protons and 4) Nuclear charge
2) Neutrons
1) Electrons
3) Positrons
5. The total number of electrons in a neutral atom must always be equal to the atom’s
1) Mass number 2) Atomic number 3) Atomic mass 4) Number of nucleons
6. An atom that has a negative charge must have
1) Greater number of protons than electrons 3) Greater number of electrons to protons
2) Equal number of protons to electrons 4) Equal number of electrons and neutrons
7. Which statement is true of all negative ions?
1) They contain equal number of protons to electrons
2) They contain equal number of protons to neutrons
3) They contain more electrons than protons
4) They contain less electrons than protons
178 Copyright © 2010 E3 Scholastic Publishing. All Rights Reserved. Survivingchem.com
Topic 3 - The Atomic Structure
20. Ground and excited state: Recognizing and interpreting ground and excited state
configurations:
1. What is the electron configuration of a sulfur atom in the ground state?
1) 2 – 4 2) 2 – 6 3) 2 – 8 – 4 4) 2 – 8 – 6
2. Which electron configuration represents an atom of lithium in an excited state?
1) 1 – 1 2) 1 – 2 3) 2 – 1 4) 2 – 2
3. Which electron configuration could represent a strontium atom in the excited state?
4) 2 – 8 – 18 – 8 – 2
1) 2 – 8 – 18 – 7 – 1
2) 2 – 8 – 18 – 7 – 3 3) 2 – 8 – 18 – 8 – 1
4. An atom has 16 protons and 16 electrons. Which is the electron configuration of this atom in the
excited state?
1) 2–18–8–4 2) 2–8–6 3) 2–18–8–8–3–1 4) 2–8–5–1
5. Atom X has 8 protons and 8 electrons. Which configuration shows this atom in the excited state?
Teacher Preview Copy
Teacher Preview Copy
1) 2 – 6 2) 1 – 7 3) 2 – 8 – 6 4) 2 – 8 – 8
6. Which is a configuration of an atom in the excited state? 4) 2 – 1 – 2
2) 2 – 8 – 3
3) 2 – 8
1) 2 – 8 – 1
7. Which configuration shows an atom in the excited state? 4) 2 – 8 – 1
1) 2- 8 – 7 - 8
3) 2
2) 2 – 8 – 8
8. The electron configuration 2 – 8 – 2 is of
1) Sodium atom in the ground state 3) Magnesium atom in the ground state
2) Sodium atom in the excited state 4) Magnesium atom in the excited state
9. The electron configuration 2 – 8 – 5 – 1 is of 3) Sulfur atom in the ground state
1) Oxygen atom in the ground state
2) Oxygen atom in the excited state 4) Sulfur atom in the excited state
10. The electron configuration 2 – 8 – 18 – 2 – 1 is of
1) Ga atom in the excited state 3) Al atom in the excited state
4) Al atom in the ground state
2) Ga atom in the ground state
21. Neutral atoms and ion Recalling concept facts and definitions
1. An atom with equal number of protons to electrons are called
1) Positive ion 2) Negative ion 3) Neutral atom 4) Isotope
2. What type of particle contains more protons than electrons?
1) A neutral atom 2) A Positive ion 3) A negative ion 4) An isomer
3. An atom that contains less electrons than protons is called 4) A negative ion
1) A neutral atom
2) An alpha particle
3) A Positive ion
4. A neutral atom must have the same number of protons and 4) Nuclear charge
2) Neutrons
1) Electrons
3) Positrons
5. The total number of electrons in a neutral atom must always be equal to the atom’s
1) Mass number 2) Atomic number 3) Atomic mass 4) Number of nucleons
6. An atom that has a negative charge must have
1) Greater number of protons than electrons 3) Greater number of electrons to protons
2) Equal number of protons to electrons 4) Equal number of electrons and neutrons
7. Which statement is true of all negative ions?
1) They contain equal number of protons to electrons
2) They contain equal number of protons to neutrons
3) They contain more electrons than protons
4) They contain less electrons than protons
178 Copyright © 2010 E3 Scholastic Publishing. All Rights Reserved. Survivingchem.com
