Building Blocks of Matter
This part of an atom has no charge and is found in the nucleus.
What is a neutron?
Matter is anything that has mass and takes up this.
What is volume (space)?
A mixture that looks the same throughout is called this.
What is a homogeneous mixture?
Two or more atoms chemically combined form this.
What is a molecule?
Ice melting is an example of this type of change.
What is a physical change?
The positive particles in an atom’s center are called this.
What are protons?
A shiny surface is described by this physical property.
What is luster?
A salad is an example of this type of mixture.
What is a heterogeneous mixture?
A compound made of 2 hydrogen atoms and 1 oxygen atom.
What is water (H₂O)?
Burning wood is an example of this type of change.
What is a chemical change?
These tiny negatively charged particles move around the nucleus.
What are electrons?
A property describing how easily something can burn.
What is flammability?
tea is an example of this type of mixture.
What is a homogeneous mixture (solution)?
The formula CO₂ represents this compound.
What is carbon dioxide?
A clue that a chemical reaction occurred when two liquids are mixed could be this forming.
What is a precipitate (solid)?
The shorthand symbols you see on the periodic table represent this.
What is an element?
The ability of a substance to combine with others to form something new.
What is reactivity?
In mixtures, substances keep these.
What are their original properties?
Oxygen gas (O₂) is this type of molecule, not a compound.
What is an element molecule?
Rust forming on iron is an example of this.
What is a chemical change?
The symbol “Au” on the periodic table stands for this element.
What is gold?
A characteristic like mass, color, or density that can be observed without changing what the substance is.
What is a physical property?
Trail mix is an example of this type of mixture.
What is a heterogeneous mixture?
These are the small numbers in chemical formulas that tell you how many atoms of each element are present.
What are subscripts?
Cutting paper into small pieces is this kind of change.
What is a physical change?