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Worksheets2.1 Atomic Structure and Periodic Table
Total questions: 38
Worksheet time: 32mins
What does the atomic number of an element tell you?
The number of protons in the nucleus of an atom of that element
The number of neutrons in the nucleus of an atom of that element
The number of electrons orbiting the nucleus of an atom of that element
The mass number of an atom of that element
What is the relationship between the atomic number and the number of protons in an atom?
The atomic number is always less than the number of protons.
The atomic number is always greater than the number of protons.
The atomic number is always equal to the number of protons.
The atomic number and number of protons are completely unrelated.
Which of the following statements about the mass number of an atom is true?
The mass number tells you the number of protons in the nucleus.
The mass number tells you the number of electrons orbiting the nucleus.
The mass number tells you the total number of protons and neutrons in the nucleus.
The mass number is the same as the atomic number for any given element.
An atom of lithium has an atomic number of 3 and a mass number of 7. How many neutrons does a lithium atom have?
3 neutrons
4 neutrons
7 neutrons
10 neutrons
Which of the following statements about the charge of subatomic particles is true?
Protons have a negative charge, electrons have a positive charge, and neutrons have no charge.
Protons have a positive charge, electrons have a negative charge, and neutrons have no charge.
Protons and electrons both have a positive charge, while neutrons have a negative charge.
Protons and neutrons both have a positive charge, while electrons have a negative charge.
What is the key difference between the atomic mass of hydrogen (1 g/mol) and the atomic mass of carbon (12 g/mol)?
Hydrogen atoms have more mass than carbon atoms.
Carbon atoms have more mass than hydrogen atoms.
Hydrogen and carbon atoms have exactly the same mass.
Mass is not related to the atomic number or mass number.
Suppose you have two pieces of metal, one of sodium and one of iron, each measuring 1 cm³ in volume. Which of the following is true about their masses?
The sodium and iron pieces will have exactly the same mass.
The sodium piece will have a greater mass than the iron piece.
The iron piece will have a greater mass than the sodium piece.
There is not enough information provided to determine the relative masses.
What is the term used to describe the measure of the mass of a substance per unit volume?
Atomic mass
Atomic number
Mass number
Density
According to the Bohr model of the atom, how are the electrons arranged around the nucleus?
Electrons are randomly distributed around the nucleus.
Electrons orbit the nucleus in a single circular path.
Electrons are arranged in different shells or energy levels around the nucleus.
Electrons are fixed in specific positions around the nucleus.
What is the key difference between the Rutherford model and the Bohr model of the atom?
The Rutherford model has a dense, positively-charged nucleus, while the Bohr model does not.
The Bohr model has electrons arranged in shells, while the Rutherford model has a random electron distribution.
The Rutherford model has a dense, positively-charged nucleus, while the Bohr model has electrons arranged in shells.
There is no significant difference between the Rutherford and Bohr models of the atom.
How would you represent the electronic configuration of a boron atom (atomic number 5)?
1,4
2,3
3,2
5,0
What is the key principle that determines how electrons fill up the electron shells of an atom?
Electrons always fill the innermost shells first before moving to outer shells.
Electrons randomly distribute themselves across all available shells.
Electrons fill up shells based on the energy requirements of the element.
Electrons are evenly distributed across all available shells.
Suppose an atom has an electronic configuration of 2,8,2. How many protons and neutrons does this atom have?
12 protons, 10 neutrons
12 protons, 12 neutrons
10 protons, 12 neutrons
10 protons, 10 neutrons
What is the relationship between the mass number of an atom and the total number of protons and neutrons it contains?
The mass number is always equal to the number of protons.
The mass number is always equal to the number of neutrons.
The mass number is equal to the sum of the number of protons and neutrons.
There is no relationship between the mass number and the number of protons and neutrons.
Suppose an atom has 3 protons and 4 neutrons. What is the mass number of this atom?
3
4
7
10
If an atom has 6 protons and 6 electrons, what can you conclude about the overall charge of the atom?
The atom has a net positive charge.
The atom has a net negative charge.
The atom has a net neutral charge.
There is not enough information to determine the overall charge of the atom.
Which of the following is the best explanation for why iron is denser than sodium, even though they have the same volume?
Iron atoms are larger than sodium atoms.
Iron atoms have more protons than sodium atoms.
Iron atoms have a greater number of neutrons than sodium atoms.
Iron atoms have a higher density of protons and neutrons in the nucleus compared to sodium.
In the Bohr model of the atom, what do the 'shells' or 'energy levels' represent?
The different types of subatomic particles found in the atom.
The different orbits or paths that electrons can take around the nucleus.
The different densities of the materials that make up the atom.
The different elements that can be found within the atom.
Suppose an element has an atomic number of 9. How many electrons would you expect to find in a neutral atom of this element?
5 electrons
9 electrons
18 electrons
19 electrons
Which of the following best explains why the mass of an atom increases as you move from left to right in the periodic table?
The number of protons increases, adding more mass to the nucleus.
The number of electrons increases, adding more mass to the electron shells.
The number of neutrons increases, adding more mass to the nucleus.
The atomic number increases, which directly corresponds to an increase in mass.
Which of the following best describes the arrangement of electrons in an atom?
Electrons are randomly distributed around the nucleus.
Electrons are evenly distributed across all available shells.
Electrons fill up the innermost shells before moving to outer shells.
Electrons always occupy the same fixed positions around the nucleus.
The electronic configuration for a boron atom is written as 2,3. What does this notation represent?
The number of protons and neutrons in the boron atom.
The number of electron shells and the number of electrons in each shell.
The atomic number and mass number of the boron atom.
The distribution of electrons in the valence shell and inner shells.
Why do electrons fill up the innermost electron shells before moving to outer shells?
Electrons are randomly distributed and have no preference for inner or outer shells.
Electrons must completely fill one shell before moving to the next higher energy level.
The outermost shells have a higher energy level than the innermost shells.
Atoms are more stable when electrons occupy the lowest possible energy levels.
Suppose an atom has the electronic configuration 2,8,2. How many protons and neutrons does this atom likely contain?
12 protons, 10 neutrons
12 protons, 12 neutrons
10 protons, 12 neutrons
10 protons, 10 neutrons
What principle or rule governs how electrons fill the electron shells of an atom?
Electrons randomly distribute themselves across all available shells.
Electrons always fill the innermost shells first before moving outward.
Electrons are evenly distributed between the available shells.
Electrons occupy the shells that require the least amount of energy.
What is the key difference between the first electron shell and the second and third electron shells in terms of how many electrons they can hold?
The first shell can hold 2 electrons, while the second and third shells can hold up to 4 electrons each.
The first shell can hold 2 electrons, while the second and third shells can hold up to 8 electrons each.
The first shell can hold 4 electrons, while the second and third shells can hold up to 2 electrons each.
There is no difference, all electron shells can hold the same number of electrons.
What is the role of electrostatic forces in holding the electrons in place within the electron shells of an atom?
Electrostatic forces have no impact on the arrangement of electrons in the shells.
Electrostatic forces randomly distribute the electrons throughout the shells.
Electrostatic forces attract the electrons to the nucleus, keeping them fixed in the shells.
Electrostatic forces repel the electrons, causing them to occupy separate shells.
Suppose an atom has the following electron shell configuration: 2,6,0. How many total electrons are present in this atom?
2 electrons
8 electrons
10 electrons
12 electrons
What is the relationship between the atomic number and the number of protons in an atom?
The atomic number is always less than the number of protons.
The atomic number is always greater than the number of protons.
The atomic number is always equal to the number of protons.
The atomic number and number of protons are completely unrelated.
Which of the following statements about the mass number of an atom is true?
The mass number tells you the number of protons in the nucleus.
The mass number tells you the number of electrons orbiting the nucleus.
The mass number tells you the total number of protons and neutrons in the nucleus.
The mass number is the same as the atomic number for any given element.
Which subatomic particle has a positive charge?
Protons
Electrons
Neutrons
Both protons and electrons
What is the key difference between the atomic mass of hydrogen (1 g/mol) and the atomic mass of sodium (23 g/mol)?
Hydrogen atoms have more mass than sodium atoms.
Sodium atoms have more mass than hydrogen atoms.
Hydrogen and sodium atoms have exactly the same mass.
Mass is not related to the atomic number or mass number.
What is the overall charge of an atom?
Positive
Negative
Neutral
It varies depending on the element.
Atoms of different elements have different numbers of protons, neutrons and electrons.
Answer the questions about the atoms of the elements.
Complete the numbers for a Boron atom.
Complete the information for Phosphorus.
Complete the information for Calcium.
Complete the table and identify the element
Element (a)
Mass Number (b)
Number of electrons (c)
Electronic Structure (d)
