Atoms, elements and compounds — IGCSE Sciences - Co-Ordinated (0654) questions by topic
10 questions on atoms, elements and compounds from 2023 and 2024 sit in the 9 to 11 mark range, built around proton and nucleon numbers for carbon and hydrogen, completing sentences on the nucleus and electron shells, and working out electron counts in a calcium atom.
State, complete and identify are the top command words, each testing recall of subatomic structure rather than calculation, so accuracy in naming protons, neutrons and electron shells is what separates full and partial credit. Submit your completed-sentence and structure answers for instant marking, since a single mislabelled particle or shell here is caught immediately rather than compounding into confusion on later stoichiometry work.
May–June 2024, Paper 31
A calcium atom has a proton number of 20 and a nucleon number of 40. Deduce the number of protons, neutrons and electrons in this atom of calcium. number of protons ... number of…
Answer this question and get it marked →October–November 2024, Paper 32
The proton numbers and nucleon numbers of carbon and hydrogen are shown in Table 11.1: carbon (proton number 6, nucleon number 12); hydrogen (proton number 1, nucleon number 1).…
Answer this question and get it marked →October–November 2024, Paper 33
The proton numbers and nucleon numbers of carbon and hydrogen are shown in Table 11.1: carbon (proton number 6, nucleon number 12); hydrogen (proton number 1, nucleon number 1).…
Answer this question and get it marked →October–November 2024, Paper 41
Complete the sentences about the structure of an atom: An atom has a central nucleus containing ... and ... and a series of ... of electrons surrounding the nucleus.
Answer this question and get it marked →October–November 2024, Paper 43
Table 8.1 shows some information about the structure of atoms (particle / charge / relative mass): electron (-1, ?); neutron (?, ?); proton (?, 1). Complete Table 8.1.
Answer this question and get it marked →May–June 2023, Paper 32
An atom of calcium has 20 protons and 20 neutrons. State the number of electrons in this calcium atom.
Answer this question and get it marked →May–June 2023, Paper 33
An atom of calcium has 20 protons and 20 neutrons. State the number of electrons in this calcium atom.
Answer this question and get it marked →May–June 2023, Paper 41
Fig. 5.1 shows a diagram of a lithium atom (nucleus containing ... and ...; outer particle ...). Complete the labels on Fig. 5.1.
Answer this question and get it marked →May–June 2023, Paper 42
Copper has two isotopes, copper-63 and copper-65. Complete Table 8.1 (proton number 29; nucleon numbers 63 and 65; protons, neutrons, electrons). Given: copper-63 protons 29,…
Answer this question and get it marked →October–November 2023, Paper 42
The element carbon exists as 3 naturally occurring isotopes. Fig. 2.1 shows an atom of one isotope, carbon-14, with subatomic particles to be labelled. Complete the labels on Fig.…
Answer this question and get it marked →Other IGCSE Sciences - Co-Ordinated topics
- Practical skills (146)
- Motion, forces and energy (41)
- Organic chemistry (16)
- Electricity and magnetism (15)
- Waves (14)
- Reproduction (13)
- Nuclear physics (13)
- Coordination and response (12)
- Organisms and their environment (12)
- Metals (11)
- Stoichiometry (9)
- Thermal physics (9)