What is according to atomic number and chemical properties?
200
The difference between an alloy and an element.
What is an element only has one type of atom, while an alloy has more than one type of atom.
200
The number of atoms in Cu₃Zn₂
What is 6?
200
The difference between a graduated cylinder and a balance.
What is a graduated cylinder is used to measure volume (liquid), and a balance is used to measure mass (weight)?
300
A way to separate a solute from a solvent
What is evaporation?
300
Carbon monoxide (CO- the stuff that comes out of the tailpipe of a car) and carbon dioxide (CO₂- the stuff that comes out of our mouths), are both a certain state of matter at room temperature.
What is a gas?
300
This alloy is made of copper and zinc to help it be stronger than either of the metals by themselves.
What is brass? (Cu₃Zn₂)
300
The number of atoms in the molecule sugar ( C₁₂H₂₂O₁₁)
What is 55?
300
All salts have this property.
What is they are soluble in water?
400
Both using screens or using filters can separate this.
What is a mixture
400
The most common element in the body.
What is oxygen?
400
A metal that is only found in ore.
What is aluminum?
400
The molecule CO₂ has this number of atom
What is 3?
400
The three most common elements in living organisms.
What are carbon, oxygen, and hydrogen?
500
The smallest form of matter
What is an atom?
500
The number of elements in Nature
What is 90?
500
The metal that is used the most in industry.
What is iron?
500
The result of a chemical reaction.
What is a new substance?
500
The type of instrument scientists use to take pictures of atoms and molecules.