Periodic Table
The organized arrangement of all known elements.
Periodic Table
A particle of matter that uniquely defines a chemical element
Atom
A positively charged subatomic particle that is found in the nucleus of an atom.
Proton
A characteristic of a substance that can only be observed by changing it into a different substance.
Chemical Properties
On the top of the Periodic Table, it is numbered 1–18 from left to right.
Groups
Anything that takes up space and mass.
Matter
A negatively charged subatomic particle that is found in the space outside the nucleus.
Electron
A characteristic of a substance that can be observed without changing the substance into another substance.
Physical Properties
The seven rows in the periodic table, with each one beginning at the far left
Period
These are a type of matter that can not be broken down into another substance by chemical reactions.
Elements
A neutral subatomic particle that is found in the nucleus of an atom.
Neutron
A change in a substance that does not change what the substance is.
Physical Change
The number of protons in the nucleus of an atom is located at the top of each element box in the Periodic Table.
Atomic Number
Two or more atoms are connected by chemical bonds, which form the smallest unit of a substance that retains the composition and properties of that substance.
Molecule
If the atomic number of sulfur (S) is 16. Then the number of protons is ____
16
A change in phase (from ice to water) is an example of _____
Physical change
The mass of an atom of a chemical element expressed, which is found at the bottom of each box in the Periodic Table
Atomic Mass
A substance made up of two or more different chemical elements.
Compound
To determine the number of neutrons in an atom what equation needs to be used?
Neutron= Atomic mass - Atomic Number
During a chemical change energy can be released in the form of ________ and ________
Light and heat