What is the smallest particle of an element that has the same properties of the element?
100
compound
What is a kind of matter made of a combination of two or more elements?
100
mixture
What is it called when different materials are placed together but are not chemically combined to form new compounds?
100
Carbon, Hydrogen, Oxygen and Nitrogen
What makes up 96% of the mass of the human body?
200
Physical properties
What are those that can be seen or measured without changing a material?
200
molecule
What is the smallest part of a substance made from more than one atom that still has the properties of that substance?
200
oxygen, hydrogen, carbon
What are three elements that combine to make sugar?
200
solution
What is a special mixture in which a substance is dissolved?
200
shiny, ductile, malleable, conduct heat, conduct electricity, most are solid at room temperature
What are the 5 properties of metals?
300
Chemical properties
What tells how a substance forms a new substance when it mixes with something else?
300
atomic number
What is the number of protons in a nucleus of an atom called?
300
salts
What are compounds made of particles that are held together by opposite charges?
300
chromatography
What is one way to identify and separate substances in a mixture?
300
Brass
What is an example of an alloy?
400
1. Physical properties can be seen or measured without changing a material.
2. Chemical properties tell how a substance forms or changes into a new substance.
What is the difference between physical and chemical properties?
400
The elements are arranged in order according to the atomic number.
How is the periodic table of elements arranged?
400
They dissolve, and they conduct electricity well.
What happens to most salts when they are placed in water?
400
solute
What is the word for a substance that dissolves?
400
Salts
What forms when acids and bases react?
500
Elements combine in many ways.
How do so few elements make up so many substances?
500
Alloys
What metals that are made from more than one element called?
500
They melt at high temperatures.
What is one property of most salts?
500
solvent
What is substance in which a different substance is dissolved?