The nuclear atom

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

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,…

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.…

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

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…

The mass spectrum of a sample of an element shows two peaks. What is the relative atomic mass of the element? A. 6.1 B. 6.5 C. 6.9 D. 7.0

Bromine is a diatomic element made up of two isotopes, $\ce{^{79}Br}$ and $\ce{^{81}Br}$, in an approximately 1 : 1 ratio. Which graph shows the full mass spectrum of bromine? A. Graph A B. Graph B C. Graph C D. Graph D

Contrast the two isotopes in terms of atomic structure.

The sample produces the following mass spectrum. (i) Explain why the three peaks around $m/z$ 72 have different relative heights. (ii) From the sample, calculate the relative atomic mass of chlorine, giving your answer to two decimal places.

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…