8.1 Atoms and molecules
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24 Terms
Wood is made of?
Cellulose
What is an atom?
The simplest unit of an element
Can atoms be seen?
No, it cannot be seen by the naked eye
What are the sub-atomic particles in an atom?
Proton neutron electron
What are the main parts of an atom?
Nucleus electron
What do the electrons do in the atom?
It moves around the nucleus at a high speed
What are the charges of each sub-atomic particles?
Proton → +
Neutron → neutral
Electron → -
What is the charge of the nucleus?
positive as it is made of protons and neutrons
What is the atom mostly made up of?
Empty space
New atomic models are needed as?
Models may not be able to explain many properties of an atom so we develop new models in order to get more reliable information
Note 
Flashcards (49)