the smallest unit of an element that retains all the properties of that element
What is an atom?
100
anything that has mass and takes up space
What is matter?
100
an atom that has lost or gained an electron resulting in an electrical charge on the atom
What is an ion?
100
this is the type of change that has occurred when hydrochloric acid and baking soda are combined and gas bubbles are released and the temperature increases
What is a chemical change?
200
the periodic table is arranged in increasing order of this number which tells how many protons are in each atom of an element
What is atomic number?
200
the subatomic particles located in the nucleus
What are the proton and neutron?
200
mass, color, melting point, freezing point, hardness
What are physical properties of matter?
200
An ion that has lost an electron resulting in a positive charge
What is a cation?
200
this type of test can identify an unknown metal due to the electrons being excited, making a quantum jump and falling back to the original energy state to produce a characteristic flame color
What is a flame test?
300
The majority of the periodic table consists of this type of element
What are metals?
300
the smallest subatomic particle with a negative charge
What is the electron?
300
a type of mixture that is also known as a solution; examples are air, salt water, gatorade
What is a homogeneous mixture?
300
an atom that has gained an electron resulting in a negative charge
What is an anion?
300
In the visible spectrum, between these 2 colors of light, the wavelength of light decreases as the energy increases
What is red to violet?
400
atomic radius shows this trend as you move from top to bottom within a group
What is increases?
400
the sum of the protons and neutrons in an atom
What is the mass number?
400
a substance that can be separated into two or more substances only by a chemical change
What is a compound?
400
an example of an element that forms a cation
What is sodium?
-a metal
- groups 1-...
400
what you see when an electron makes a jump from it's original energy level to a higher energy level then falls back down
What is a characteristic flame color?
500
ionization energy (the energy required to remove an electron) shows this trend as you move from left to right across the periodic table
What is increases?
500
all atoms of the same element have the same number of these subatomic particles
What is the proton?
500
rotting of food, rusting, explosions, and decaying are examples of this type of change
What is a chemical change?
500
Sodium Chloride, NaCl is an example of this type of compound in which a cation and anion have bonded
What is an ionic compound?
500
a practical application of the ability to create characteristic flame colors from the application of heat energy to metals