Part 1 Matter and Materials Flashcards
Heterogenous mixture
Consists of substances that are visibly different or are in different states
Homogenous mixture
Subdstances are evenly dustributed throughout the mixture
Compounds
A compund is a chemical substance that forms when two or nmore atoms of different elemts combine
Pure substance
Any material is not a mixture is a pure substance
Mono-
One
Di-
two
Tri-
Three
Tetra-
Four
Penta-
Five
Properties of metals
malleable
ductile
thermal conductors
electrical conductors
sonorous(has a riging sounds when you hit it)
Metals have:
metallic lustre
high melting point
high density
Non-metals properties
brittle
thermal and electrical insulators
dull and do not have a shiny appearance
Metalloids
Metalliods have some metal and some non-metal properties
Ferromagnetic
materials that can be magnetised strongly
Alloy
homogenous mixture of two or more metals
Electronegativity
how strongly the atom attracts the hared pair of electrons in a chemical bond
First ionisation energy
The energy require to remove the most loosely held electron in a gas state
Electron afinity
The energy change when an atom gains an electron to form a negative ion
Periodic law
states that many of the physical and chemical properties of the element tend to follow a pattern which increasing atomic number
Atomic radius
is the distance from the nucleas to the outermost stable electron
Covalent Bond
Are formed when electrons are shared between two atoms
Ionic bonds
are formed when one or more electrons are tranfered from a metal to a non-metal
Relative atomic mass
ratio of the average mass of an atom of an element
Metallic bonding
are formed when a delocalised electron’pool’ is shared amoung positive ions in a metal
Empirical formula
is a chemical formula that shows the simplest ratio between atoms in a compound
Molecular formula
is a chemical formula that showns the actual number and types of atoms ina molocule
