Flashcards in lesson 2 Elements and compounds Deck (8)
A pure substance that cannot be broken down into any simpler substances.
Any substance that is formed by the chemical combanation of two or more elements and acts like a single substance
The smallest unit of an element that retains the properties of that element
A particle in the nucleus of an atom that carries one unit of positive electric charge.
A particle in the nucleus of an atom that has no net electric charge
A particle in the space out-side the nucleus of an atom that carries one unit of negative electric charge.
A dense structure inside the cell. One of the airborne dust particles around witch water condenses as droplets or ice crystals before falling as precipitation. An atoms dense center, where most of it's mass is.