States of Matter
What are the three main states of matter?
Solid, liquid, gas
What is a pure substance made of only one type of atom?
Element
What is the name of K₂O?
Potassium oxide
A substance with pH 7 is considered what?
Neutral
What is nuclear fission?
A nucleus splitting into smaller parts
Liquids have what kind of shape and volume?
Indefinite shape, definite volume
What is a pure substance made of more than one type of atom chemically combined?
Compound
What is the name of SO₂?
Sulfur dioxide
Which substance is most basic: vinegar (pH 3) or ammonia (pH 11)?
Ammonia
200: Why does fission release energy?
Answer: Mass is converted to energy
Solids have what type of shape and volume?
Definite shape and definite volume
What type of mixture has uniform composition throughout?
Homogeneous mixture
What is the correct name for H₂O?
Dihydrogen monoxide
Which property describes a colloid?
Particles remain evenly mixed and scatter light
300: What is nuclear fusion?
Answer: Atoms combine into heavier nuclei
Gases have what type of shape and volume?
Indefinite shape and indefinite volume
What type of mixture has visibly different parts?
Heterogeneous mixture
What type of bond involves electron transfer?
Ionic bond
Why does stirring help a solute dissolve faster?
It increases collisions between solute and solvent particles
400: Where does fusion naturally occur?
Answer: In stars
When a solid changes directly to gas, what is the process?
Sublimation
Air is an example of what type of mixture?
Homogeneous solution
Name CaCl₂.
Calcium chloride
What term describes the substance being dissolved?
Solute
500: Which type of nuclear reaction powers atomic bombs?
Answer: Fission