States of Matter
Phase Changes are always a ________ change
What is a physical change?
A _______ property is used to describe/classify a substance.
What is a physical property?
A mixture is formed when
What is two or more substances combine physically?
What is the nucleus?
Most of the periodic table is made up of
What is metals?
To move from one phase to another we must
What is increase or decrease the temperature?
Good conductor, high malleability, burning in the air, low melting point, boiling point, and atomic mass.
_____ does not belong because ________.
What is burning in the air because it is a chemical property and the others are physical properties?
The following equation is balanced (true or false)
H2O2 = 2H2 + 02
What is false?
It forms when two elements (same elements or different elements) combine chemically
What is a molecule?
elements are arranged by
What is increasing atomic number?
To make a liquid turn into a gas we must
What is increase the temperature?
Chemical changes form a
What is a new substance?
What is that matter/mass cannot be created or destroyed?
The number of electrons an atom has if the atomic number is 9 and the atomic mass is 10.
What is 9?
The least reactive elements are found in this group
What is noble gases?
Name one example of sublimation
What is dry ice sitting on the counter?
Dissolving salt in water is
What is a physical change?
Two types of mixtures are
What are homogeneous and heterogeneous mixtures?
Electrons located in the outer ring/orbital are called
What are valence electrons?
The most reactive elements are found here
What is the alkali metals and halogen groups?
If water is changing from a liquid to a block of ice, we can expect the particles to _____ and ______.
What is slow down and move closer together (more compact)?
Adding energy does ________ to a reaction.
What is speeds up a reaction?
How many atoms are in the following compound
C6H12O6
What is 24?
The number of neutrons of an atom with an atomic number of 17 and an atomic mass of 35
What is 18?
Name two things that each element in a group have in common
What is the number of valence electrons and similar properties