Nuclear symbols and subatomic particles

Chemia IBPaper 1A, maj 2026, TZ1wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 1

What is correct about the species $\ce{^{65}Zn^{2+}}$? A. 65 protons, 65 neutrons, 63 electrons B. 30 protons, 35 neutrons, 28 electrons C. 30 protons, 65 neutrons, 28 electrons D. 65 protons, 35 neutrons, 63 electrons

Chemia IBPaper 2, maj 2026, TZ1wzorowane5 pktobliczenioweśrednie (szac.)

Zadanie 2a

(i) State the number of protons, electrons and neutrons in $\ce{^{85}Rb+}$. (ii) State the full electron configuration for $\ce{^{85}Rb+}$. (iii) The relative atomic mass, A_r, of Rb is 85.47. Determine the relative mass of the first isotope of Rb to four…

• Tabela do uzupełnienia

Chemia IBPaper 1A, maj 2026, TZ3wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 2

Which statement about the ion $\ce{^{25}Mg^{2+}}$ is correct? A. It has the same number of neutrons as $\ce{^{26}Mg^{2+}}$ B. It has two more protons than $\ce{^{23}Na+}$ C. It has the same number of protons as $\ce{^{27}Al^{3+}}$ D. It has the same number of…

Chemia IBPaper 2, maj 2026, TZ3wzorowane3 pktobliczenioweśrednie (szac.)

Zadanie 3a

Silver has two stable and abundant isotopes. Its relative atomic mass is 107.87. (i) Determine the percent abundance of each isotope, showing your working. (ii) State the number of protons, neutrons and electrons in $\ce{^{109}Ag+}$.

• Tabela do uzupełnienia

Chemia IBPaper 1A, maj 2025, TZ1wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 1

A beam containing protons, neutrons and electrons is passed between two charged metal plates. The three paths observed are labelled P, Q and R. Which row correctly identifies the particle following each path? A. P: electron, Q: proton, R: neutron B. P: proton,…

• Materiał graficzny

Chemia IBPaper 1A, maj 2025, TZ1wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 2

The letters below stand for four species, not for element symbols. Which pair of species has an identical number of outer-shell electrons? $\ce{^{31}_{15}J^{2-}}$, $\ce{^{40}_{18}L^{+}}$, $\ce{^{39}_{19}M^{+}}$, $\ce{^{32}_{16}Q^{2+}}$ A. J and M B. L and Q C.…

Chemia IBPaper 2, maj 2025, TZ2wzorowane5 pktobliczenioweśrednie (szac.)

Zadanie 2a

Naturally occurring gallium consists of two isotopes: 60 % of the atoms contain 38 neutrons and the remaining 40 % contain 40 neutrons. (i) Use section 7 of the data booklet to deduce the nuclear symbol of the heavier isotope. (ii) Calculate the relative…

Chemia IBPaper 1A, maj 2025, TZ3wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 4

Which set correctly shows the numbers of protons, neutrons and electrons in $\ce{^{65}Cu^2+}$? A. Protons 29, neutrons 36, electrons 31 B. Protons 29, neutrons 36, electrons 27 C. Protons 27, neutrons 65, electrons 27 D. Protons 65, neutrons 65, electrons 29

Chemia IBPaper 1A, listopad 2025, TZ1wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 2

What is the number of subatomic particles in $\ce{^{88}Sr^2+}$? A. Protons: 40, neutrons: 50, electrons: 36 B. Protons: 38, neutrons: 50, electrons: 36 C. Protons: 38, neutrons: 88, electrons: 40 D. Protons: 40, neutrons: 88, electrons: 40

Chemia IBPaper 1A, specimen 2025wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 2

At 25 °C the density of heavy water, $\ce{^{2}H2O(l)}$, is 1.11 g cm⁻³, while the density of ordinary water, $\ce{^{1}H2O(l)}$, is 1.00 g cm⁻³. Which statement explains this difference? A. Each $\ce{^{2}H}$ nucleus contains one…

Chemia IBPaper 2, specimen 2025wzorowane3 pktotwarteśrednie (szac.)

Zadanie 2a

In the Geiger–Marsden experiment, α-particles (the nuclei of helium-4 atoms) were fired at a very thin foil of silver. A detector that could be moved around the foil recorded the angle of deflection, θ, of the particles. Two of the possible routes are shown:…

• Materiał graficzny

Chemia IBPaper 2, specimen 2025wzorowane1 pktotwartełatwe (szac.)

Zadanie 2c

Outline why the scientific model of the atom has been modified several times since it was first proposed.

Chemia IBPaper 1, maj 2024, TZ1wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 5

What is the correct number of subatomic particles in $\ce{^{65}_{30}Zn^2+}$? A. 30 protons, 32 electrons, 35 neutrons B. 30 protons, 28 electrons, 65 neutrons C. 35 protons, 28 electrons, 30 neutrons D. 30 protons, 28 electrons, 35 neutrons

Chemia IBPaper 2, maj 2024, TZ1wzorowane3 pktotwarteśrednie (szac.)

Zadanie 6b

Chromium is a first-row transition element. (i) Deduce the nuclear symbol, _Z^AX, of the chromium-52 ion that contains 21 electrons. (ii) Chromium(II) chloride, CrCl₂, melts at 824 °C. Explain how the ions are held together in solid…

Chemia IBPaper 2, listopad 2024wzorowane1 pktotwartełatwe (szac.)

Zadanie 2c

Give the number of protons, electrons and neutrons in the calcium ion, $\ce{^{44}_{20}Ca^{2+}}$.

Chemia IBPaper 1, maj 2023, TZ1wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 6

How many neutrons and electrons are present in the ion $\ce{^{27}_{13}Al^3+}$? A. 14 neutrons and 16 electrons B. 14 neutrons and 10 electrons C. 13 neutrons and 10 electrons D. 14 neutrons and 13 electrons

Chemia IBPaper 2, maj 2022, TZ1wzorowane3 pktotwarteśrednie (szac.)

Zadanie 1e

Most oxide ions are $\ce{^{16}O^2-}$. (i) State the number of protons, neutrons and electrons in this ion. (ii) Some oxide ions are $\ce{^{18}O^2-}$. State the term that describes the relationship between $\ce{^{16}O^2-}$ and $\ce{^{18}O^2-}$. (iii) The…

Chemia IBPaper 2, maj 2022, TZ1wzorowane2 pktotwartełatwe (szac.)

Zadanie 1f

Atoms were once thought to be the smallest particles of matter, impossible to divide. Suggest two pieces of evidence that show an atom has an internal structure.

Chemia IBPaper 1, listopad 2022wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 5

Which quantities are different between the species $\ce{^{40}_{19}K^{+}}$ and $\ce{^{40}_{20}Ca^{2+}}$? A. Number of protons only B. Number of protons and neutrons only C. Number of neutrons and electrons only D. Number of protons, neutrons and electrons