State the relative masses and charges of protons, neutrons, and electrons.
Show answer
Protons have a mass of 1 and charge of +1. Neutrons have a mass of 1 and a charge of 0. Electrons have a very small mass and a charge of -1.
The Nextutor Chemistry flashcard library has 47 decks and 720 cards across 15 topics for GCSE and A-Level, including Atomic Structure, Bonding, Rates of Reaction and more. Decks are tagged by exam board (AQA, Edexcel and OCR) so you can revise from the version that matches your course.
State the relative masses and charges of protons, neutrons, and electrons.
Protons have a mass of 1 and charge of +1. Neutrons have a mass of 1 and a charge of 0. Electrons have a very small mass and a charge of -1.
What is a eukaryotic cell?
A cell that contains its genetic material enclosed within a nucleus. Plant and animal cells are eukaryotic.
Describe how an ionic bond forms between a metal and a non-metal.
The metal atom loses electrons to form a positive ion. The non-metal atom gains these electrons to form a negative ion. Oppositely charged ions are strongly attracted by electrostatic forces.
State the two main methods of ionisation in time-of-flight (TOF) mass spectrometry.
The two methods are electron impact ionisation and electrospray ionisation. Electron impact fires high-energy electrons to knock off an electron, while electrospray uses a high-voltage needle and a volatile solvent to attach a proton.
State two equations used to calculate the mean rate of a chemical reaction.
Mean rate = quantity of reactant used / time taken. Alternatively, Mean rate = quantity of product formed / time taken. Common units are g/s, cm³/s, or mol/s.
Define a transition metal.
A transition metal is a d-block element that can form at least one stable ion with an incomplete d sub-level.
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The library currently covers 15 topics: Atomic Structure; Bonding; Rates of Reaction; Organic Chemistry; Acids, Bases and Salts; Electrolysis; Chemical Analysis and Tests; The Earth and Atmosphere; Quantitative Chemistry; Organic Chemistry; Physical Chemistry; Transition Metals; Analytical Chemistry and Spectroscopy; Inorganic Chemistry and Periodicity; Electrochemistry and Redox. New decks are added over time.
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