General --> Memorise (mostly separation techniques) Flashcards
What is Malleability?
Malleability is the ability to be hammered into thin sheets
What is Ductility?
Ductility is the ability to be stretched into wires
What is Brittleness
Brittleness is classified as shattering when placed under pressure.
What is decanting? Is it a form of physical or chemical separation?
Decanting is the process of pouring away a liquid while leaving a solid precipitate behind.
What is decanting? Is it a form of physical or chemical separation?
Decanting is the process of pouring away a liquid while leaving a solid precipitate behind.
Is centrifugation a physical or chemical technique of separation?
Physical
What is the difference between sieving and filtration?
Sieving is when you separate a solid from a solid, with different sizes.
Filtration however, IS SEPARATING SOLIDS FROM LIQUIDS
What is fractional distillation?
Fractional Distillation is the separating of liquids based on their different boiling points. (One liquid is boiled and collected by turning it into a gas and back to a liquid in another beaker)
What is a molecule?
A molecule is a chemical structure consisting of 2 or more atoms, held in a fixed arrangement by chemical bonds.
What is the relationship between compounds and molecules?
All compounds are molecules but not all molecules are compounds.
A compound is a molecule since it fits the description of involving an atom bonding with two or more other atoms.
How many atoms does an element have
An element will always only have ONE ATOM.
An atom is the smallest particle/unit of matter.
What difference in electronegativity determines if the elements have a pure covalent bond?
If the difference in electronegativity values is close or equal to ZERO, then those elements share a pure covalent bond.
What is the difference between covalent networks and covalent molecular?
Covalent networks are composed of atoms covalently bonded together in a three-dimensional network or layers of two-dimensional networks. Covalent networks have very high melting and boiling points.
Covalent Molecular are ordinary atoms held together by covalent bonds, with low melting and boiling points. Covalent Molecular are generally weaker and less malleable than networks, which are quite the opposite.
What are the different types of intermolecular forces? (3 main ones)
List them from strongest to weakest
Ion Dipole, Hydrogen Bonding and Dipole-Dipole in that order
What is the strongest type of chemical bond in chemistry?
A covalent bond
