intro to matter
That are able to be observed without being changed into a different property.
A substance can be classified by its physical properties which are properties that
Solid
A substance with a definite shape and definite volume is a...
ion
When an atom loses or gains electrons, it becomes a(n)
Four methods that can be used to separate mixtures are
Four methods that can be used to separate mixtures are
The particles spread and leave each other
What happens when the gas particles in an inflated ball when it gets a hole? Why?
When an atom loses an electron it
mass/volume=density
The density of a substance is calculated by
Evaporation
A puddle dries up by the process of
The metal atoms in iron are held together by
Physical properties.
The abilities to dissolve in water and to conduct electric current are examples of...
The pressure increases
Explain why placing a dented table-tennis ball in boiling water is one way to remove the dent in the ball(assume the ball has no holes)
A covalent bond in which electrons are shared equally is called a
Law of exothermic change law of conservation of mass
The fact that matter is neither created nor destroyed in any chemical or physical change is called the...
Liquid water
A student is studying water. The sample has a definite volume, but no definite shape. Which state of matter is the student examining?
Neutral groups of atoms formed by by covalent bonds
The formulas N2 H2O and CO2 all represent molecules which are defined as