Atomic Structure
This subatomic particle has a negative charge.
What is an electron?
This state of matter has definite shape and volume.
What is a solid?
This type of bond forms when electrons are transferred.
What is an ionic bond?
Elements in the same column have the same number of these.
What are valence electrons?
Substances that are physically combined form this.
What is a mixture?
This number determines the identity of an element.
What is the atomic number (number of protons)?
The change from liquid to gas below boiling is called this.
What is evaporation?
This type of bond forms when electrons are shared.
What is a covalent bond?
These elements are very reactive and located in Group 17.
What are halogens?
Substances that are chemically combined form this.
What is a compound?
This part of the atom contains most of its mass.
What is the nucleus?
During boiling, temperature does this.
What is stays constant?
Metals conduct electricity because of these free-moving electrons.
What are valence electrons (pooled electrons)?
⭐ 400 (DOUBLE JEOPARDY)
These elements are stable because their outer shells are full.
What are noble gases?
This type of mixture is evenly mixed throughout.
What is a homogeneous mixture?
The number of protons plus neutrons equals this.
What is the mass number?
This measures how much heat is needed to raise 1 gram of a substance 1°C.
What is specific heat?
(DOUBLE JEOPARDY)
This type of bond forms when electrons are shared unequally.
What is a polar covalent bond?
The first energy level can hold this many electrons.
What is 2?
In H₂O, the subscript 2 represents this.
What are two hydrogen atoms?
**Double Jeopardy**
An atom has 15 protons and 16 neutrons. Identify the element and find the mass number.
What is phosphorus? Mass number = 31.
Solid changing directly to gas is called this.
What is sublimation?
This element is least likely to form bonds.
What is neon?
This model shows valence electrons using dots.
What is an electron dot diagram?
Explain the difference between a compound and a mixture.
A compound is chemically combined and cannot be separated physically; a mixture is physically combined and can be separated physically.