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BMAT EXAM - Chemistry 2022/2023 with 100% correct answers

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Proton = r.m is 1, r.c is +1 Neutron = r.m s 1, r.c. is 0 Electron = r.m is 0.0005, r.c is -1 State the relative mass and charge of: a. Proton b. Neutron c. Electron The number of protons in the nucleus of a ...

Proton = r.m is 1, r.c is +1 Neutron = r.m s 1, r.c. is 0 Electron = r.m is 0.0005, r.c is -1 State the relative mass and charge of: a. Proton b. Neutron c. Electron The number of protons in the nucleus of an atom. What does the atomic number represent? The number of protons and neutrons n the nucleus of an atom. What does the mass number represent? NO OVERALL CHARGE - the number of protons is equal to the number of electrons. What s the overall charge of an atom? 2,8,8 What is the electronic structure of argon? Atoms that have the same number of protons but a different number of neutrons, e.g. carbon-12 and carbon-14. Isotope. It uses the average mass of all the isotopes of an element, taking into account the relative mass of each isotope and its relative abundance. How does the relative atomic mass work? a. Increases b. Higher c. Decreases a. Reactivity ____________ down group 1. b. There is a ___________ density as you move down group 1. c. Both the melting points and boiling points _________ decrease as you move down the group. One that forms one or more stable ions which have incompletely filled d orbitals. Transition metal They exhibit a we range of oxidation states, allowing the, to form many ionic compounds. The formation of complexes cause the d orbitals to split into two energy sub-levels, enabling the complexes to absorb different frequencies of light. Hence why they form coloured ions. Why do transition metals form coloured ions? 1s2,2s2,2p6,3s2,3p6,4s2,3d7 What is the electronic structure of Co? This is due to their ability to change oxidation states, or in the case of metals, to absorb other substances on to their surface and activate them in the process. Why are transition metals good oxidation states? The atoms of the more reactive metal displace the less reactive metal within a compound. e.g. Magnesium + copper sulfate --> Magnesium sulfate + copper. What happens in displacement reactions? a. Transportation, i.e. aircraft,

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