Science Exam Year 9 Flashcards
Mixture
The negatively charged subatomic particle found in shells around the nucleus
Periodic Table
Atoms of the same element have a different number of neutrons. ( different mass number)
Electron
Electron
Element
The positively charged subatomic particle found in the nucleus of an atom
Neutron
a substance made up of two or more different particles mixed not joined
Molecule
a shorthand way of showing what happens in a reaction: shows motivation and products
Atomic Number
Horizontal row on the periodic table contains elements with outer electrons in the same shell
Electron configuration
A pure substance made up of only one type of atom
Mass number
the simplest particle of matter, join together to form molecules or lose or gain electrons to form ions
ION
A substance made up of only one type of particle
ISOTOPE
A vertical column on the periodic table containing elements with the same number of outer electrons (same chemical properties)
Proton
a pure substance made up of two or more different atoms joined together
Equation
A charged particle made when an atom gains or loses electrons
Pure substance
The arrangement of electrons in an atom showing the number of electrons in each shell
Atom
the force holding atoms together (bond) caused by non-metal atoms sharing electrons
