Atoms And Molecules Flashcards
“Atoms” is from a Greek word meaning ___________
Uncuttable
Things are made up of ________ pieces of stuff
Tiny
Where are the heavy particles of an atom located
In the middle
Where are the light particles found?
Light
Atoms are mostly_________ space
Empty
What charges are found in the nucleus?
Protons and neutrons
What charge buzzes around the nucleus at 500 m distance away?
Electrons
Electrons ________ each other and move around so fast that the atom acts like a __________
Repel
Solid
How many atoms would fit on the head of a pin?
1 million
Atoms are the basic ________ ________ of all matter
Building blocks
When atoms combine what do they make?
Molecules
What is all matter is made up of?
Atoms and molecules
How many parts hydrogen is water and how many parts oxygen is water?
What are is two parts hydrogen and one part oxygen
How can water be split apart?
By electricity
True or false?
The number of protons in the nucleus makes the atoms different
True
