element vocab Flashcards
periodic table
A table of all the elements in which elements with similar properties are grouped together
Chemical symbol
A one or two-letter code for an element that is used by scientists in all countries.
Atom
The smallest part of an element that can exist.
Compound
A substance made up of atoms of two or more elements, strongly joined together.
Molecule
A group of two or more atoms, strongly joined together.
Chemical formula
A formula that shows the relative number of atoms of each element in a compound.
Ionic bond
Electrostatic attraction between oppositely charged ions
Covalent bond
Shared pair of electrons between two non-metals.
Metallic bond
A lattice of metal atoms with a sea of delocalised electrons.
Atomic number
The number of protons (and electrons) an atom contains
Mass number
The number of protons and neutrons in the nucleus of an atom.
Proton
A positively charged sub-atomic particle in the nucleus.
Electron
A negatively charged sub-atomic particle in the shells surrounding the nucleus.
Neutron
A neutral sub-atomic particle found in the nucleus of an atom.
Element
A substance that cannot be broken down into other substances.
