Edexcel A Level Chemistry June 2026 Paper 1 Question Paper VERIFIED Complete Questions and Verified Answers
Edexcel A Level Chemistry June Question Paper and Mark Scheme 2026 Paper 1 | Fully Solved and Verified Define first ionisation energy - answer - Energy required to remove one electron from each atom in a mole of gaseous atoms producing one mole of 1+ gaseous ions Define second ionisation energy - answer - Energy required to remove an electron (the second electron) from each atom in a mole of gaseous 1+ ions producing one mole of 2+ gaseous ions how does the number of protons affect ionisation energies - answer - the more protons, the stronger the nuclear charge, resulting in stronger forces of attraction between the nucleus and electrons, requiring more energy to break apart how does the electron shielding affect ionisation energies - answer - the more electrons between the electron getting removed and the nucleus, the lower the ionisation energy. This is because the electrons repel the outer shell electron, balancing out some of the positive charge/pull coming from the nucleus how does the electron subshell the electron is being lost for affect ionisation energies - answer - the closer the electron is to the nucleus, the stronger the forces will be therefore requiring higher energies to overcome 1st ionisation energy down a group - answer - decreases increase in shell number (larger atomic radii) and shielding outweighs the increase in nuclear charge from greater number of protons 1st ionisation energy across a period - answer - - Increasing trend due to greater proton number and so atomic radii being drawn in - dip at beginning of p orbital due to being easier to lose than second electron in s orbital - dip at third last due to being the first electron in a pair in the p-orbitals, the two electrons repel each other, lowering energy required trend in successive ionisation energies - answer - every time goes up, big leap when going down a quantum shell equation representing first ionisation energy of x atoms - answer - X₍g₎ -- X⁺₍g₎ + e⁻ how to calculate relative atomic mass from relative abundance of isotopes - answer - (%₁ x mass₁) + (%₂ x mass₂) + ..... how to calculate peak heights for diatomic molecules - answer - relative abundance of the isotopes, the probability of each combination makes the ratio how to work out relative molecular mass of a molecule from mass spectra - answer - furthest right peak will be all atoms together What is an M+1 peak - answer - occurs due to the natural abundance of the carbon-13 isotope, which increases mass number of normal molecule by 1 how to predict mass spectra of a molecule - answer - analyse different individual possible fragments and their stability, the more stable, the more likely they are to occur, therefore likely having a higher abundance. There will be a line at every possible mass number of each of the fragments how does atomic emission spectra provide evidence for the existence of quantum shells - answer - Spectral lines give evidence of electrons moving from one energy level to another within the atom how do successive ionisations provide evidence for the existence of quantum shells - answer - Successive ionisations of an atom suggest that there are energy shells with large energy differences between them. why do atoms emit light when heated - answer - it is the energy required to allow electrons to jump back and forth across shells What is periodicity - answer - the repeating pattern of chemical and physical properties of the elements with increasing atomic number what is an orbital - answer - most probable region where you can find an electron can hold up to two electrons with opposite spins number of electrons that fit in the 1st, 2nd, 3rd and 4th quantum shells - answer - 2,8,18,32 shape of an s-orbital - answer - shape of a p-orbital - answer - can have 3 different orientations - x,y,z how many electrons and orbitals does a s subshell hold - answer - 2 electrons in 1 spherical s orbital how man
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- Subido en
- 9 de octubre de 2026
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- Escrito en
- 2026/2027
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