Atoms Flashcards
What are atoms?
Atoms are tiny particles which make up all substances.
What is the structure of an atom?
Eight protons, eight neutrons
What are elements?
Elements are substances completely made up of one kind of atom.
What are molecules?
Molecules are two or more elements joined together through a chemical bond. The elements can be the same or different.
What are some examples of molecules?
H20, O2
What is a compound?
A compound is two or more different elements joined together.
What’s an example of a compound?
NaCl
What is a mixture?
A substance that is a mixture of different elements and compounds.
What are the three groups of elements on the periodic table?
Metals, non metals and metalloids.
What are the properties of metals?
Metals are lustrous, ductile, malleable, solid at room temperature, can conduct heat and electricity.
What are the properties of non-metals?
Brittle, dull, do not conduct heat or electricity.
What are the properties of metalloids?
Metalloids can be lustrous or dull, can or cannot conduct heat or electricity and can be brittle, malleable and/or ductile.
What are elements named after?
Elements are named after the letter of their Greek or Latin name, or the person who discovered it.
