science
Terms
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- atoms are composed of subatomic particles called
- protons & neutrons & electrons
- the majority of the mass of an atom is located in the center of the atom known as the
- nucleus
- Atoms of different elements have a different number of
- protons
- the periodic table of elements organizes elements by
- the atomic number
- the majority of elements in the period table are
- metals
- metals
- conduct heat and electricity & are malleable/ductile. also can be bent into variety of shapes
- a smaller number of elements lack shiny luster and do not conduct heat or electricity
- nonmetals
- a special group of elements that do not react with any other elements are called
- noble gases
- when 2 or more elements are chemically combined they form a
- compound
- molecules are much farther apart and moving faster than in solids
- gas
- molcules are close together and move very slow
- solid
- molecules are usually farther apart and moving faster than in solids
- liquid
- slowing down the molecules in a liquid so that it becomes a solid is called
- freezing
- adding heat energy to a solid so that it changes into a liquid called
- melting
- matter is anything that has
- mass
- matter takes up
- space
- protons
- mass-1 charge - positive location- nucleus
- neutron
- mass-1 charge - no charge location - nucleus
- electron
- mass- 0 charge - negative - location- outside nucleur
- the temperature at which a liquid turns a solid is called
- freezing
- the process of changing a liquid to a gas is called
- evaporation