Matter and Atoms
What is matter?
something that has mass and takes up space.
What are the three classifications of matter?
Elements, compounds, and mixtures
What is the Periodic Table of Elements?
A way of listing the elements
What are physical properties?
characteristics that can be directly observed using you 5 senses without changing the substance.
All matter is made of atoms. What are atoms?
Atoms are the smallest possible unit of matter
What are elements?
Pure substances with only one type of atom that cannot be divided.
How are elements listed on the Periodic Table?
By the structure of their atoms
What is a physical change?
When one or more physical properties of an substance change but the substance remains the same
What are the three parts of an atom?
Proton, Neutron, and Electron
Oxygen is classified as what?
An element
How are elements arranged on the Periodic Table?
Elements are arranged based on their properites
What are chemical properties?
Properties that can only be observed after a chemical change has occurred.
What two parts of an atom are found in the nucleus?
Proton and Neutron
Water (H2O) is classified as what?
Compound
What do periods on the Periodic Table signify?
Periods signify the highest unexcited energy level for an electron
What is a chemical reaction?
The process where a substance changes to become a new substance
What two parts are always equal?
Protons and electrons
What are the two types of mixtures?
Homogeneous and heterogeneous
What do groups on the Periodic Table signify?
Groups are based on properties. Elements in the same group have similar properties.
What is the Law of Conservation of Mass?
Matter cannot be created nor destroyed.