F321 Unit 1: Definitions
3.0 / 5 based on 1 rating
- Created by: Laura Dowling
- Created on: 04-05-13 13:36
What is an isotope?
Isotopes are atoms of the same element with different numbers of neutrons
1 of 35
What is the Atomic (proton) number?
The atomic (proton) number is the number of protons in the nucleus of an atom
2 of 35
What is the Mass (nucleon) number?
The mass (nucleon) number is the number of particles (protons and neutrons) in the nucleus
3 of 35
What is an ion?
An ion is a positively or negatively charged atom or (covalently bonded) group of atoms (a molecular ion)
4 of 35
What is the relative isotopic mass?
The relative isotopic mass is the mass of an atom of an isotope compared with one-twelfth of the mass of an atom of carbon-12
5 of 35
What is the Relative atomic mass?
The relative atomic mass is the weighted mean mass of an atom of an element compared with one-twelfth of the mass of an atom of carbon-12
6 of 35
What is the relative molecular mass?
The relative molecular mass is the weighted mean mass of a molecule campared with one-twelfth of the mass of an atom of carbon-12
7 of 35
What is the relative formular mass?
The relative formular mass is the weighted mean mass of a formula unit compared with one twelfth of the mass of an atom of carbon-12
8 of 35
What is the amount of substance?
The amount of substance is the quantity whose unit is mole. Chemists use 'amount of substance' as a means of counting atoms
9 of 35
What is the Avogadro constant?
The Avogadro constant is the number of atoms per mole of the carbon-12 isotope (6.02 x 10x23 mol-1)
10 of 35
What is a mole?
A mole is the amount of any substance containing as many particulars as there are carbon atoms in exactly 12g of the Carbon-12 isotope
11 of 35
What is molar mass?
Molar mass is the mass per mole of a substance. The units of molar mass are g mol-1
12 of 35
What is empirical formula?
Empiricalformula is the simplest whole-number ratio of atoms of each element present in a compound
13 of 35
What is a molecule?
A molecule is a small group of atoms held together by covalent bonds
14 of 35
What is the molecular formula?
The molecular formula is the actual number of atoms of each element in a molecule
15 of 35
What is the molar volume?
The molar volume is the volume per mole of a gas. The units of molar volume are dm3 mol-1. At room temperature and pressure, the molar volume is approximately 24.0 dm3 mol-1
16 of 35
What is concentration?
Concentration is the consentration of a solution is the amount of solute, in mol, dissolved per 1dm3 (1000 cm3) of solution
17 of 35
What is standard solution?
A standard solution is a solution of known contration. Standard solutions are normally used in titrations to determine unknown information about another substance
18 of 35
What is a species?
A species is any type of particle that takes part in a chemical reaction
19 of 35
What is stoichiometry?
Stroichiometry is the molar relationship between the relative quanties of substances taking part in a reaction
20 of 35
What is an acid?
An acid is a species that is a proton donor
21 of 35
What is a base?
A base is a species that is a proton acceptor
22 of 35
What is an alkali?
An alkali is a type of base that dissolves in water forming hydroxide ions, OH-(aq) ions
23 of 35
What is a salt?
A salt is any chemical compound formed from an acid when a H+ ion from the acid has been replaced by a metal ion or another positive ion, such as ammonium ion NH4
24 of 35
What is a cation?
A cation is a positively charged ion
25 of 35
What is an anion?
An anion is a negatively charged ion
26 of 35
What is meant by Hydrated?
Hydrated refers to a crystaline compound containing water molecules
27 of 35
What is meant by Anhydrous?
Anhydrous refers to a substance that contains no water molecules
28 of 35
What is water of crystallisation?
Water of crystallisation refers to water molecules that form an essential part of the crystalline structure of a compound
29 of 35
What is the oxidation number?
An oxidation number is a measure of the number of electrons that an atom uses to bond with atoms of another element. Oxidation numbers are derived from a set of rules
30 of 35
What is Oxidation?
Oxidation is the loss of electrons or an increase inoxidation number
31 of 35
What is reduction?
Reduction is the gain of electrons or a decrease in oxidation number
32 of 35
What is a redox reaction?
A redox reaction is a reaction in which both reduction and oxidation takes place
33 of 35
What is reducing agent?
A reducing agent is a reagent that reduces (adds electrons to) another species
34 of 35
What is an oxidising agent?
An oxidising agent is a reagent that oxidises (takes electrons from) another species
35 of 35
Other cards in this set
Card 2
Front
What is the Atomic (proton) number?
Back
The atomic (proton) number is the number of protons in the nucleus of an atom
Card 3
Front
What is the Mass (nucleon) number?
Back
Card 4
Front
What is an ion?
Back
Card 5
Front
What is the relative isotopic mass?
Back
Related discussions on The Student Room
- Edexcel A-Level History - Mao's China »
- Btec hasc »
- How is Btec extended level 3 art and design graded? »
- Is it possible for me to get DDD »
- Can I still get a Distinction in Further Maths? »
- WJEC Unit Codes for Cambridge Application »
- Should I repeat Chemistry exams? »
- Is this possible? »
- BTEC Business Extended Diploma Grade Calculator »
- Applied Science Unit 1 Exam 2023 biology »
Similar Chemistry resources:
0.0 / 5
3.5 / 5 based on 2 ratings
0.0 / 5
3.0 / 5 based on 2 ratings
0.0 / 5
2.0 / 5 based on 1 rating
Comments
No comments have yet been made