LESSON 1 Flashcards
(21 cards)
Are classification of matter made up of all the same type of atom, all the same molecules, or all the same ionically bonded elements.
Pure substance
are made up of two or more substances which are mixed together but are not chemically combined.
mixture
are the smallest particle or unit of an element that has the properties of that element.
atoms
it is considered as the lightest element among the others and is the first element in the periodic table
hydrogen
it is one of the most abundant elements in the universe
carbon
it is found in toothpaste in the form of fluoride, which can help prevent dental cavities
fluorine
it is one of the first metals used by man
copper
it is one of the most abundant metals in the earths crust and can be recycled several times
aluminum
it is commonly used in food preservation in the form of sodium chloride or table salt
sodium
it is very reactive metal that is never found free in nature
potassium
it is a metal that exists in the liquid state at room temperature
mercury
it is one of the essential elements needed by the body. it helps make bones stronger
calcium
it is a yellowish nonmetal usually found in volcanic vents
sulfur
it is a metal that is used to make jewelry
gold
it has the highest electrical conductivity among metals
silver
it is one of the most abundant elements in the universe. it is colorless, odorless and tasteless gas
helium
it is a noble gas primarily used to light up advertising signs or displays
neon
it is an essential element in the body and a component of hemogoblin, which cames oxygen from the lungs to the tissues in the body
iron
constitute the greatest number of elements in the periodic table.
metals
Are elements that lack or do not have the characteristics of metals.
non- metals
are substances composed of 2 or more kinds of atoms that are chemically bonded together in fixed proportions
compounds
