Year 9 Flashcards
Name the three sub-atomic particles
Protons, neutrons and electrons
Isotope definition
Different versions of the same element. Same number of protons but a DIFFERENT number of nuetrons.
Who came up with the idea that electrons orbit around the nucleus of an atom at a set distance?
Niels Bohr
What determined the order of elements in the early periodic table
Atomic weight
What 2 sub-atomic particles are the same weight?
Protons and electrons
What is an Iion?
A different number of protons to electrons
Group 0 on the periodic table are known as ?
The noble gases
What is the name of the gases that come after the alkali metals?
Transition metals
Particle definition
A single amount of a substance
Element definition
One type of atom only
Atom definition
Tiny ‘spheres’, that are the smallest amount possible of a substance
Compound definition
More than one TYPE of atom bonded together
