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 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, TZ2wzorowane3 pktobliczeniowełatwe (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, specimen 2025wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 2

Heavy water, $\ce{^{2}H2O}$, boils at 101.4 °C, whereas ordinary water, $\ce{^{1}H2O}$, boils at 100.0 °C at the same pressure. Which statement is correct? A. The boiling points differ because $\ce{^{2}H2O}$ molecules have a greater mass, while the chemical…

Chemia IBPaper 2, specimen 2025wzorowane2 pktotwarteśrednie (szac.)

Zadanie 2a

α-particles are the nuclei of helium-4 atoms. In an experiment based on the work of Geiger and Marsden, a beam of α-particles is directed at a very thin platinum foil and the angle of deflection, θ, of each particle is recorded by a detector that can be moved…

• Materiał graficzny

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

Zadanie 2c

Outline why scientists have replaced earlier models of the atom with new ones.

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

Zadanie 6b

(i) Deduce the nuclear symbol, _Z^AX, of the chromium-52 ion that contains 21 electrons. (ii) Complete the orbital diagram of this ion by drawing an arrow for each electron. (iii) Predict whether this ion is paramagnetic or diamagnetic and…

• Materiał graficzny

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

Zadanie 3c

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

Chemia IBPaper 2, maj 2022, TZ1wzorowane4 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