Chemistry Flashcards
Atomic mass
The number of protons and neutrons in an atoms nucleus
Atomic number
The number of protons in an atoms nucleus
An atom
The smallest unit of a element
Chemical family
A column of elements with similar characteristics on the periodic table
Chemical formula
A notation that indicates the types and numbers of atoms in a pure substance
Chemical property
A property of a element that is determined when the composition of the substance is changed, and one or more new substances are produced
Compound
A pure substance composed of two or more chemical joined elements
Density
The measure of how much mass is contained in a given unit volume of a substance, usually measured in mass per unit volume
Electron
A negatively charged particle in an atom
Electron shell
The shell on the outside of the nucleus that contains the electrons
Element
A pure substance that cannot be broken down into any simpler means by any chemical or physical means
Element symbol
An abbreviation for a chemical element
Green chemistry
Chemistry that is eco friendly
Lewis dot diagram
A diagram that shows valence electron in an atom
Metal
An element that is lustrous, malleable, ductile, and conducts heat and electricity
Metalliod
An element that has properties of both metals and non metals
Neutron
A neutral particle in the atoms nucleus
Non metal
An element, usually a gas or a soft powdery solid that does not conduct heat or electricity
Nucleus
The centre of an atom
Period
A row on the periodic table
Physical property
A characteristic of a substance that can be determined without changing the composition of the substance
Protron
A positively charged partial in the atoms nucleus
Qualitative property
A property of a substance that is not measured and does not have a numerical value
Quantitate property
A property of a substance that is measured and has a numerical value
