Chemistry 0620 · IGCSE
Atomic structure and the Periodic Table
100 practice questions on Atomic structure and the Periodic Table, with worked solutions and instant marking.
An element named Q has 4 electrons in its outer shell and 69 neutrons, and it conducts electricity. What is Q?
Feb/March 2016
The diagram presents a section of the Periodic Table. Groups I, II, III, IV, V, VI, VII and VIII are included. The elements shown are Li in Group I; Ti, Cr, Fe, Cu and Zn among the transition metals; C, N, O, F, Ne; Al, Si, P, S, Cl, Ar; Ge, Br, Kr; Sn, I, Xe; Pb.
Feb/March 2016
Use the list of elements below to answer the questions that follow. aluminium argon carbon lithium magnesium nickel nitrogen oxygen sulfur Each element may be used once, more than once, or not at all.
Feb/March 2017
What is meant by the nucleon number of an atom?
Feb/March 2018
What does the term nucleon number of an atom mean?
Feb/March 2019
This question concerns electronic structures. The electronic structures of five atoms, A, B, C, D and E, are shown. Use these electronic structures to answer the following questions. Each electronic structure may be used once, more than once, or not at all.
Feb/March 2019
An atom is represented below. What is the nucleon number of this atom?
Feb/March 2020
The Periodic Table is a way of sorting elements into groups.
Feb/March 2020
Which statements describe the Periodic Table? 1 The elements are ordered by their nucleon number. 2 The elements are ordered by their proton number. 3 It is used to predict the properties of elements.
Feb/March 2021
The diagram displays part of the Periodic Table. Answer the following questions using only the symbols of the elements shown in the diagram. Each symbol may be used once, more than once, or not at all.
Feb/March 2021
A section of the Periodic Table is displayed. Which element has two electrons in its outer shell and three electron shells?
Feb/March 2023
Which statement concerning elements in the Periodic Table is correct?
Feb/March 2023
A section of the Periodic Table is shown. Which element has two electrons in its outer shell and three electron shells?
Feb/March 2023
Elements P and Q contain the same number of electron shells. An atom of Q has a larger number of electrons in its outermost electron shell than an atom of P. Which statements are correct?
Feb/March 2024
Which one of the following statements about an atom of fluorine, $^{19}_{9}\text{F}$, is correct?
Feb/March 2024
Magnesium belongs to Group II of the Periodic Table.
Feb/March 2024
What electronic configuration does a $\text{P}^{3-}$ ion have?
Feb/March 2025
Sulfur atoms are able to form the negative ion $\text{S}^{2-}$. The following three atoms or ions are given. • argon, $\text{Ar}$ • calcium, $\text{Ca}$ • oxide, $\text{O}^{2-}$ What number of these atoms or ions has the same electronic configuration as $\text{S}^{2-}$?
Feb/March 2025
An atom of element Q has 19 electrons, 19 protons and 20 neutrons. Which element is Q?
May/June 2016
The table gives the atomic structure of four atoms. Which atom is not a metal?
May/June 2016
Some chlorine-containing substances have their structures displayed. A contains one carbon atom attached to four chlorine atoms. B is a diatomic chlorine molecule Cl-Cl. C is a section of an ionic lattice made up of Cl- and K+ ions. D is a chain arrangement containing C, H, Cl and F atoms. E is a structure in which aluminium atoms are bonded to chlorine atoms.
May/June 2016
Define what is meant by the term atomic number.
May/June 2016
Which component of an atom has a relative mass of $1$ and a relative charge of $0$?
May/June 2017
The electronic arrangements of five atoms, A, B, C, D and E, are displayed. Answer the questions below about these atoms. Any atom may be used once, used more than once, or not used at all.
May/June 2017
The electron arrangements for five atoms, A, B, C, D and E, are displayed. Respond to the questions below about these atoms. Each atom may be used once, more than once, or not used at all.
May/June 2017
The electronic arrangements of five atoms, A, B, C, D and E, are shown. Answer the questions that follow about these atoms. Each atom can be chosen once, more than once, or not chosen at all.
May/June 2017
This question concerns subatomic particles.
May/June 2017
Which atom contains the same number of protons, neutrons and electrons?
May/June 2018
Which element is grouped as a non-metal in the Periodic Table?
May/June 2018
Four particles are represented by symbols. $^{40}_{20}\text{W}\quad ^{41}_{20}\text{X}^{2+}\quad ^{37}_{18}\text{Y}\quad ^{37}_{17}\text{Z}$ The letters do not stand for the chemical symbols. Which particles contain the same number of neutrons?
May/June 2018
Which element is listed as a non-metal in the Periodic Table?
May/June 2018
Flerovium, Fl, with atomic number 114, was first produced in research laboratories in 1998.
May/June 2018
Which of the following statements about an atom of fluorine, $^{{19}}_{{9}}\text{F}$, is correct?
May/June 2019
Gas G contains 10 electrons. Gas H contains eight additional electrons compared with gas G. Both gases are monoatomic. Which statement about G and H is correct?
May/June 2019
Which of the following statements about an atom of fluorine, $^{19}_{9}\text{F}$, is correct?
May/June 2019
Deduce the percentage by mass of the other elements present on Earth.
May/June 2019
This question concerns the structures of atoms and ions.
May/June 2019
Atoms are made up of particles named electrons, neutrons and protons.
May/June 2019
Element X contains 7 protons. Element Y contains 8 additional protons compared with X. Which statement about element Y is correct?
May/June 2021
Element X contains 7 protons. Element Y has 8 additional protons compared with X. Which statement about element Y is correct?
May/June 2021
Element X contains 7 protons. Element Y has 8 more protons than X. Which statement about element Y is correct?
May/June 2021
Element X contains 7 protons. Element Y contains 8 more protons than X. Which statement about element Y is correct?
May/June 2021
Element X contains $7$ protons. Element Y contains $8$ more protons than X. Which statement correctly describes element Y?
May/June 2021
Element X contains 7 protons. Element Y has 8 additional protons compared with X. Which statement about element Y is correct?
May/June 2021
The electronic arrangements of five atoms, A, B, C, D and E, are shown. Answer the questions that follow about these electronic arrangements. Each arrangement may be chosen once, more than once, or not used at all.
May/June 2021
The electronic structures for five atoms, A, B, C, D and E, are displayed. Answer the questions below about these electronic structures. Each electronic structure may be used once, more than once or not at all.
May/June 2021
State which electronic structure, A, B, C, D or E, represents an atom of a Group VI element in the Periodic Table.
May/June 2021
Fill in the table so that you can work out the numbers of protons, electrons and neutrons in the magnesium atom and the copper ion shown, then name the atom or ion in the last row.
May/June 2021
Fill in the table so that you can work out the numbers of protons, electrons and neutrons in the boron atom and chloride ion shown, then identify the atom or ion in the final row.
May/June 2021
Which diagram shows how the outer-shell electrons are arranged in a noble gas?
May/June 2022
The elements sodium through argon make up Period 3 of the Periodic Table. Which row shows the pattern across Period 3 from left to right?
May/June 2022
An atom belonging to an element has 4 electrons, 4 protons and 6 neutrons. Which group of the Periodic Table does this element belong to?
May/June 2022
The electronic structure of element Z is $2,8,1$. Which of the following statements about Z are correct?
May/June 2022
Which diagram shows how the outer-shell electrons in a noble gas are arranged?
May/June 2022
The numbers of protons and neutrons, together with the electronic structures of four particles, W, X, Y and Z, are shown. Which particles show the same chemical properties?
May/June 2022
The relative atomic mass, $A_r$, of an element is found by comparing the mass of one atom of that element with the mass of one atom of element Q. Which element is Q?
May/June 2022
X and Y are two different elements, but they contain the same number of nucleons. Which statement about X and Y is correct?
May/June 2022
Particle P is neutral, with an atomic number of $18$ and a mass number of $40$. Particle Q has an atomic number of $19$, a mass number of $40$ and a charge of +1. Which statement is correct?
May/June 2022
The symbols and formulae below are given. CaO CH$_4$ C$_2$H$_4$ C$_2$H$_6$ Cl$^-$ Cu$^{2+}$ H$_2$ He K$^+$ N$_2$ Na$^+$ SO$_2$ Use these symbols or formulae to answer the questions that follow. Any symbol or formula may be chosen once, more than once, or not chosen at all. State which symbol or formula stands for:
May/June 2022
Which diagram represents the electronic structure of a noble gas?
May/June 2023
State the electron’s relative charge and relative mass.
May/June 2023
An atom of element X contains: • 5 protons • 6 neutrons • 5 electrons. Which of the following statements about element X are correct?
May/June 2023
Atoms X and Y have the same mass number, but their atomic numbers are different. Which of the following statements about X and Y is correct?
May/June 2023
Which of the following statements about trends across a period in the Periodic Table are correct? 1 Aluminium has greater metallic character than sodium. 2 Beryllium has greater metallic character than carbon. 3 Boron has greater metallic character than lithium. 4 Magnesium has greater metallic character than silicon.
May/June 2023
An atom of element X has: • 5 protons • 6 neutrons • 5 electrons. Which of the following statements about element X are true? 1 X has an atomic number of 6. 2 X has a nucleon number of 11. 3 X belongs in Group II of the Periodic Table. 4 X is located in the second period of the Periodic Table.
May/June 2023
Fig. 1.1 presents part of the Periodic Table. Use only the elements shown in Fig. 1.1 to answer the questions below. Each element symbol may be used once, more than once, or not used at all.
May/June 2023
Fig. 1.1 displays part of the Periodic Table. Use only the elements shown in Fig. 1.1 when answering the questions below. Each element symbol may be used once, more than once or not at all.
May/June 2023
The element symbols for Period 2 in the Periodic Table are listed below. Li Be B C N O F Ne Use these Period 2 symbols to answer the questions that come next. You may use any symbol once, more than once, or not at all.
May/June 2023
The diagram illustrates several properties of particles in an atom. Which labelled part of the diagram do electrons belong to?
May/June 2024
An ion is shown by the symbol $^{18}_{8}\text{O}^{2-}$. Which of the following statements about this ion are correct?
May/June 2024
What does the term nucleon number mean?
May/June 2024
The following four statements about atoms are given. 1. The central region of an atom carries a positive charge. 2. Protons and electrons are found in the nucleus. 3. Protons and electrons have equal mass. 4. The nucleus contains most of the mass of an atom. Which statements are correct?
May/June 2024
The electron arrangements for two elements are shown below. element L: $2,8,8,1$ element M: $2,8,4$ Which line gives the group number and period number for element L and for element M?
May/June 2024
How many electrons are there in a single molecule of ammonia, $\text{NH}_3$?
May/June 2024
An atom of element R has 15 protons, 16 neutrons and 15 electrons. What is R?
May/June 2024
Describe this carbon atom in terms of the locations of the electrons, neutrons and protons in the atom; the numbers of neutrons and protons; and the electronic configuration.
May/June 2024
The symbol $^{34}_{16}\text{S}$ is used to show one sulfur atom.
May/June 2024
Describe the arrangement of the electrons, neutrons and protons in this phosphorus atom; include the numbers of neutrons and protons, and give the electronic configuration.
May/June 2024
Which of the following statements about the Periodic Table is correct?
May/June 2025
An atom belonging to element Q has 19 electrons, 19 protons and 20 neutrons. What is Q?
May/June 2025
Which component of an atom has relative mass 1 and relative charge 0?
May/June 2025
Of the statements about elements in the Periodic Table, which one is correct?
May/June 2025
Which statement gives the definition of the atomic number of an element?
May/June 2025
An atom of the element erbium is shown as $^{167}_{68}\text{Er}$. Which row gives the numbers of protons, neutrons and electrons in this atom?
May/June 2025
Which atom contains the same number of protons, neutrons and electrons?
May/June 2025
Which row shows the numbers of protons, electrons and neutrons in a zinc atom?
May/June 2025
Which particles possess the electronic configuration $2,8,8$?
May/June 2025
What does the term nucleon number of an atom mean?
May/June 2025
This question concerns nitrogen and its compounds.
May/June 2025
The table gives data about atoms of three separate elements. What are the values of W, X, Y and Z?
Oct/Nov 2016
The table presents details for four distinct particles. What are the values of W, X, Y and Z?
Oct/Nov 2016
This atom contains three electron shells. Its outer shell holds three electrons. How many protons and how many neutrons does this atom have?
Oct/Nov 2016
The table gives details about atoms of three different elements. What are the values of W, X, Y and Z?
Oct/Nov 2016
The Periodic Table is partially shown below. Which element has three electron shells and two electrons in its outer shell?
Oct/Nov 2016
The table gives information about four different particles. What are the values of W, X, Y and Z?
Oct/Nov 2016
This atom has 3 electron shells. Its outer shell contains 3 electrons. How many protons and how many neutrons does this atom contain?
Oct/Nov 2016
The diagram presents a section of the Periodic Table. Use only the elements shown in the diagram to answer the questions that follow. An element may be used once, more than once, or not used at all.
Oct/Nov 2016
Calcium sits in Group II of the Periodic Table.
Oct/Nov 2016
The diagram displays part of the Periodic Table. Use only the elements shown there to answer the questions below. Each element can be chosen once, more than once or not used at all.
Oct/Nov 2016
This diagram presents a section of the Periodic Table. The symbols shown are: H; Li; Ti; Cr; Cu; Zn; C; N; O; F; Ne; Si; Cl; Ar; Ge; Br; Kr; Sn; I; Xe. Answer the following questions using only the elements in the diagram. Any element may be used once, more than once or not at all.
Oct/Nov 2016