Elements
shiny and conducts heat energy and electric current
What are Metals
An element that does not conduct heat or electric current and are dull
What are Nonmetals
a pure substance composed of two or more elements that are chemically combined
what is a compound
simple compounds can be broken down into elements through this
What is a chemical change
This can separate a mixture of iron and aluminum.
what is a magnet
Each element can be identified by its unique set of properties
What is characteristic properties
When a substance can be hammered into thin sheets
What is malleable
This compound has the elements sodium and chlorine combined
what is table salt
a combination of two or more substances that are not chemically combined
What is a mixture
composed of particles of two or more substances that are distributed evenly among each other
What is a solution
a pure substance that cannot be separated into simpler substances by physical or chemical means
What is an element
Has properties of both metals and nonmetals and makes up the last category of the periodic table.
What are Metalloids
Some compounds react with acid. For example ___________ found in chalk reacts with acid
what is calcium cabonate
True or false: No chemical change happens when a mixture is made
True
a substance that is dissolved
what is a solute
a substance in which there is only one type of particle.
Some of these conduct heat, and some conduct electric current
Metalloids
You exhale carbon dioxide that was made in your body. Plants take in cabon dioxide, which is used in ___________
What is photosynthesis
Each substance in a mixture keeps its _________
what is identity
a substance in which the solute is dissolved
What is a solvent
This might be used to identify elements. Examples would be flammable, or how something reacts with oxygen
What is Chemical Properties
There are 8 elements that make up 98.5% of the Earth's crust: 26.6% oxygen, 8.1% aluminum, 5% iron, 3.6% calcium, 2.8% sodium, 2.6% potassium, and 2.1% magnesium. The rest is silicon. What percentage of the Earth's crust is silicon?
what is 27.7%
This compound is made up of hydrogen, carbon, and oxygen
What is vinegar
Table sugar is a compound made of carbon, hydrogen, and oxygen. If sugar contains 41.86% carbon and 6.98% hydrogen, what percentage of sugar is oxygen?
what is 51.16%
These are solid solutions of metals or nonmetals dissolved in metals
What are alloys