Physical & Chemical Changes
A change in a substance's form, but the atoms remain the same.
What is a physical change?
Name 2 phase changes.
What is vaporization, condensation, freezing, melting, sublimation or deposition?
A mixture is a physical combination but a compound is this type of combination.
What is chemical?
These are the tiny particles that make up all matter.
What are atoms?
Three numbers that are the same within an atom are _______, _______ and _______.
What are protons, electrons, and atomic number?
Two examples of physical changes.
What are cut, tear, fold, paint, break, mix, melt, etc.
Water vapor changes to liquid water during which process?
What is condensation?
A taco is an example of this type of mixture where it does not look the same throughout.
What is a heterogeneous?
This is found in the shell or cloud of an atom and has a negative charge.
What is an electron?
Most of the elements found on earth are this: metal, nonmetal or metalloid.
What is metal?
Corroding and rusting are examples of this type of change.
What is chemical?
In order to change a solid to a liquid, you need to add __________.
What is heat or energy?
In this type of mixture, materials are distributed evenly. Ex. coffee, vanilla ice cream
What is a homogeneous mixture?
These two things make up the Nucleus of an atom.
What are protons and neutrons?
The second shell of an atom can hold this many electrons.
What is 8?
One way to start a phase change is to add energy. Adding energy is another way of saying __________.
What is heat it up?
This phase change is called Sublimation.
What is changing directly from a solid to a gas?
In a ___________, no new substances are formed and the ingredients can be separated by physical means.
What is a mixture?
To find the atomic mass, I would add together these two numbers.
What are protons and neutrons?
The electrons found in the outer shell of an atom are known as this type of an electron.
What are valence?
Boiling is vaporization inside a liquid. Vaporization at the surface of a liquid is called ___________.
To change a liquid to a solid, you would need to take away this.
What is energy (or heat)?
Which of the following is NOT a method of separating mixtures?
-Evaporation
-Sifting
-Freezing or
-Magnetism?
What is freezing?
Groups of atoms that are identical are called this.
What is an element?
The periodic table is broken into 18 vertical columns also known as these.
What are groups or families?