Table Manners
Atomic mass – Atomic number =
What is the number of neutrons?
These malleable elements are good conductors of heat and electricity, with high melting points.
What are metals?
The atomic number of chlorine
What is 9?
Water freezing to ice is an example of a _____ change
What is physical?
A pure substance that only contains one kind of atom
What is an element?
The vertical columns of the periodic table which have the same # of electrons in their outermost shell
These 17 elements loosely grouped together have properties usually opposite that of metals. They are poor conductors of electricity and heat and in the solid state are non lustrous and brittle.
What are non-metals?
What is Cu?
A change where a new substance is produced is a ____ change.
This is a non-uniform mixture, like trail mix, salad dressing, or muddy water
What is a heterogenous mixture?
The horizontal rows of the periodic table with the same # of shells.
What are periods?
Group 17, very chemically reactive because there is one open space in the outer electron shell.
What are halogens?
The state of oxygen at room temperature
What is gas?
A fire is an example of a _______ reaction.
What is chemical?
A uniform mixture like air, salt water, or coffee.
What is a homogenous mixture? (or solution)
The element with the symbol O
What is oxygen?
Group 18, Non reactive because they have full outer electron shells
What are noble gases?
At room temperature, this non-metal is a bright yellow, odorless, and brittle crystalline solid
What is sulfur?
Dissolving salt into water is an example of a ______ change
What is a physical change?
Matter than can be physically separated into parts
What is a mixture?
The element with the atomic number 7
What is nitrogen?
Highly reactive metals in Group 1 with one electron in the outer shell, including lithium, sodium, and potassium.
What are alkali metals?
The element with the elemental symbol P
What is phosphorus?
A heterogenous mix of two liquids that cannot dissolve into one another, like oil and water
What is an emulsion?
A pure substance that can be separated into different atoms by chemical means
What is a compound?