The Periodic Table of Elements Flashcards
What are 5 properties of metals?
Metals are lusterous, are good conductors, are malleable, are ductile and are solid at room temperature except for Mercury.
What are 4 properties of semi-metals?
Semi-metals can be dull or shiny, are decent conductors, are not ductile and are not malleable
What are 5 properties of non-metals?
Non-metals are dull, are insulators, are not malleable, are not ductile and are gases and liquids at room temperature.
All matter is made up of small particles called…
atoms/ elements
An element is made up of…
the same kind of atom
An element is a substance that cannot be broken down into…by…reactions
smaller particles/ simpler substances…chemical
All known elements are listed on the…
periodic table of elements
Atoms of one element…from atoms of all the other elements.
differ
What are atoms made up of?
positive protons, negative electrons and neutral neutrons
What is the central region of the atom called and what is it made up of?
The nucleus is made up of protons and neutrons.
Why are atoms neutral?
Atoms have the same number of positively charged protons and negatively charged electrons.
What are examples of pure substances?
Elements and Compounds
What are diatomic molecules?
Diatomic molecules consist of two atoms of the same element.
What are the 8 diatomic elements?
Hydrogen, Oxygen, Nitrogen, Bromine, Iodine, Astatine, Chlorine and Fluorine.
What is a compound?
A compound is a material that consists of different elements chemically bonded.
The atoms in a compound are always bound in a…
chemical reaction
What is a chemical bond?
A chemical bond is an attraction between atoms that enables the formation of chemical compounds.
How can compounds be broken down or chemically bonded into other compounds or their original elements?
By heat or electrolysis
How can mixtures be separated?
Through physical means such as hand-sorting, magnetism, distillation, evaporation and filtration.
What is a green gas?
Chlorine
What is a yellow solid?
Sulfur
What is coal made up of?
Carbon
What element has similar chemical properties to potassium?
Sodium
What element forms a precipitate when reacting with silver nitrate?
Fluorine
What gas makes up 75% of the earth’s atmosphere?
Nitrogen
