The nuclear atom

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, TZ2wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 2

Bromine (A_r = 79.90) consists of two isotopes, $\ce{^{79}Br}$ and $\ce{^{81}Br}$. What is the relative abundance of $\ce{^{81}Br}$? A. 10 % B. 45 % C. 55 % D. 90 %

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 1A, maj 2025, TZ2wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 2

Which property is the same for ammonia molecules containing deuterium, ND₃, and ordinary ammonia molecules, NH₃? A. Molar mass B. Molecular geometry C. Density of the gas at STP D. Rate of diffusion

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