Atoms/ Atomic structure
What is matter?
Anything that has mass and takes up space.
What does the Periodic Table do?
Arranges elements by their properties
What is a property?
A characteristic used to identify something.
What is a Heterogenous mixture?
What is a Physical Reaction?
When something only changes physical properties.
What are the three subatomic particles in an atom?
Protons, neutrons, and electrons.
Has an atomic number of 79
What is Gold?
What are some chemical properties?
Oxidation, combustibility, and Reactivity with acids.
What is the difference between an atom and a compound?
An atom is made up of one thing, compound is made up of multiple.
The equation to get Density
M/V = D
Where are protons located?
the nucleus
What is group 17 called?
Halogens
Is a candle melting a chemical or physical reaction or both?
Both, chemical and physical reaction
A mixture
How many atoms are in the equation MgO?
Total atoms= 2
Where are electrons located?
The energy levels on the outside of the nucleus
What is group 1 on the periodic table called?
The Alkali Metals
What are some physical properties?
Ductility, boiling point, melting point, and solubility.
Cannot be separated into any simpler form chemically and physically
Element
How many atoms are in the equation NaCl?
What is a valence electron?
An electron in the outermost energy level.
What is the number at the top of an element called?
What is a chemical reaction?
Something that reacts or changes its substances and properties completely.
Not chemically combined
A mixture
On the pH scale what number represents neutral?
7