atoms
Protons have a
positive charge
Neutrons have a
neutral charge
Electrons have a
negative charge
Matter is made out of
Atoms
What does scale mean?
The relative size of things
The nucleus of an atom is made of:
Protons and Neutrons
What is a substance?
Something that is made of all the same atoms or groups of atoms
Molecules are
repeating groups of atoms that form separate groups
Extended strucuture are:
many atoms or repeating groups that connect
What are the parts of an atom?
Nucleus with protons and neutrons, surrounded by electrons
What is a model?
Something that helps us visualize things that are hard to see
What does property mean?
Something that can be observed about a substance
What happens to atoms during a chemical reaction?
During a chemical reaction, atoms rearrange to form different groups of atoms.
How did the rust in the pipes form?
there was a chemical reaction between the iron pipes and fertilizer
Explain, in one sentence, why different substances can have different properties using the words "atoms" and "groups of atoms."
Different substances have different properties because they are made of different groups of atoms (the types and numbers of atoms in those groups determine the substance's properties).