Vocab I
This what we call two or more of the same atoms bonded together.
molecule
This is the group of elements on the periodic table that are poor conductors of heat/electricity.
HINT: found to the right of the stair step
nonmetals
Substance made from only one type of atom, and found on the periodic table.
Element
Flammibility is evidence of this type of change.
HINT: chemical or physical
Chemical change
This is what we call the abbreviation used on the periodic table for the name of the element.
chemical symbol
Basic building block of matter is a(n) ......
atom
The positive particle found in the nucleus of an atom is called...
a proton
The temperature at which a solid turns to a liquid is called the....
melting point
What do we call the following...
CH4 + 2O2 ---> CO2 + 2H2O
A neutral particle that can be found in the nucleus of an atom is called a(n)....
Neutron
Solid, liquid, gas, & plasma are the 4...
states of matter
A combination of things that can be separated out, and a salad is an example.
Mixture
This is a family/groug of elements that have properties of both metals and nonmetals and can be found in the stairstep of the Periodic Table.
Metalloids
When two or more elements combine we call it a _________.
HINT: Not the same kind, but different elements
compound
metals
These types of properties are used to describe observations of matter.
Physical properties
A negatively charged particle that is found outside the nucleus of an atom is called a(n)...
electron
This type of mixture is made of difference substances that stay physically separate, like different colored M&M's in a bowl.
heterogeneous mixtre
During a chemical reaction, we can observe these specific kinds of properties.
Chemical properties
How likely an element is to undergo a change is referred to as...
HINT: how reactive is the element
reactivity
This type of mixture has the same composition throughout.
Homogenous mixture
In this system, mass can escape during a chemical reaction.
open system
This is what we call the process of substances undergoing a chemical change and transforming into a different substance.
This is something we use to help explain things, for example, an illustration or a 3-D representation.
a model
In this system mass stays within the boundaries of the system, but energy flows freely in and out.
Closed system