- Study guides, Class notes & Summaries

Atomic number - Answer-Number of protons (top number) Atomic mass - Answer-Protons and neutrons (bottom number) Ions - Answer--During reactions elements can gain or lose electrons. -Forming ions with the same electronic configuration as the nearest noble gas. -Metals lose electrons- positive ions- cations. -Non-metals gain electrons- negative ions- anions Groups of ions - Answer-1 +1 2. +2 3. +3 4. - 5. -3 6. -2 7. -1 8 - Ionic compounds - Answer- Properties - Ans...

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1 pages

Written in 2022/2023

Grade A+

STUDYGUIDESET

Chemistry 2024 paper 1 1.1 - answers-Copper sulfate+water 1.2 - answers-Residue of copper carbonate at the bottom of the beaker. 1.3 - answers-To remove excess copper 1.4 - answers-Bunsem burner 1.5 - answers-92.8=mass/12.5 x100 0.928x12.5 = mass = 11.6 1.6 - answers-Copper has low reactivity so it will take a long time to react Sodium has high reactivity so it will react aggressively with sulfuric acid which is a hazard 2.1 - answers-Simi- both have 1 electron in their oute...

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5 pages

Written in 2024/2025

Grade A

harrisonwairumbi

AQA A LEVEL CHEMISTRY PAPER 1 2026 CERTIFICATION PRACTICE EXAM: 100 QUESTIONS, CORRECT ANSWERS, DETAILED RATIONALES, STUDY GUIDE Question 1. Which statement correctly describes the relative masses and charges of the three fundamental subatomic particles? A. Protons have a relative mass of 1 and charge of +1; neutrons have mass 1 and charge 0; electrons have negligible relative mass and charge −1. B. Protons and electrons have equal masses but opposite charges. C. Neutrons have a relative ...

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38 pages

Written in 2026/2027

Grade A+

proitote

AS Level Chemistry Atomic number - answer-Number of protons in an element Mass number - answer-Number of protons and neutrons Ion - answer-Electrically charged particle formed by the loss/gain of electrons Relative masses of P,N and E - answer-1,1, 1/2000 (respectively) Isotopes - answer-Atoms of the same element with different number of neutrons but same number of protons. What are steps of mass spectroscopy? - answer-Ionisation, Acceleration, Deflection, Detecting Ionisation...

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2 pages

Written in 2024/2025

Grade A+

harrisonwairumbi

Chemistry Paper 1 (A level Edexcel) 1. Vanadium +2 - answers-Violet 2. Vanadium +3 - answers-Green 3. Vanadium +4 - answers-Blue 4. Vanadium +5 - answers-Yellow 5. Chromium +2 - answers-Blue 6. Chromium +3 (Water ligand) - answers-Green 7. Chromium +3 (Ammonia Ligand) - answers-Violet 8. Chromium +6 - answers-Orange 9. chromate ion - answers-Yellow (dilute orange) 10. Dichromate ion - answers-Orange 11. Copper +2 (coordination number 4) - answers-Green 12. Coppe...

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2 pages

Written in 2024/2025

Grade A

harrisonwairumbi

Molarity Equations - Answer-M=mol/Liters Density Formula - Answer-d=m/V rate of effusion equation - Answer-Square root of molar mass of heaviest molecule/ square root of molar mass of lighter molecule Average Atomic Mass Equation - Answer-(mass₁) (abund₁) + (mass₂) (abund₂)...... Total energy equation - Answer-∆Ε= q +w ∆H° of a reaction - Answer-(Bonds Broken) - (Bonds Formed) Metal oxides +acids → ? - Answer-water + salt dipole dipole reactions - Answer-pola...

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3 pages

Written in 2022/2023

Grade A+

STUDYGUIDESET

gram - Answer-SI unit for mass liter - Answer-SI unit for volume density - Answer-the amount of mass in a given volume (units: g/mL) exothermic - Answer-a reaction that releases heat as a byproduct pure substance - Answer-either an element or a compound chemical forumla - Answer-show the kind(s) and proportions of atoms in a compound (Ex: H2O) Chemical equation - Answer-a way to describe a chemical reaction using chemical formulas for substances and symbols for state of matter....

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4 pages

Written in 2022/2023

Grade A+

STUDYGUIDESET

In this list, which substance can be classified as a chemical? a. salt b. sleep c. cold d. heat e. temperature - Answer-Salt Which of the following is not a chemical? a. salt b. water c. light d. carbon dioxide e. sugar - Answer-Light Chlorofluorocarbons are broken down in the atmosphere by ________. a. nitrogen dioxide b. ozone c. iron d. AIDS e. ultraviolet light - Answer-UV Light The production of smog from NO gas requires ________. a. nitrogen b. chlorine c. water d. oxy...

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16 pages

Written in 2022/2023

Grade A+

STUDYGUIDESET