Atoms
are the building blocks of all matter
atoms
a pure substance
an element
The measure of the amount of matter in an object
mass
What are the 3 states of matter?
Gas
Solid
Liquid
What is an example of an element
a. water
b. gold
c. sugar
d. wood
b. gold
symbolized as "Au" on the periodic table
what three particles make up an atom?
protons, electrons, and neutrons
how many kinds of atoms make up an element?
one
The amount of space that a substance or object occupies.
volume
Has definite shape and volume
solids
Lee has two strips of copper metal. Why do the two strips have similar properties?
a. They are the same shape
b. They are the same weight
c. They contain similar atoms
d. They contain different atoms.
c. They contain similar atoms
which of the three particles are found in an atom's nucleus (center of the atom)?
protons and neutrons
elements combine through chemical bonds in a fixed ratio to form _______
compounds
Refers to how tightly packed atoms are in matter
density
Has definite volume but no definite shape
liquids
FREE POINTS
congratulations
what is the charge of a proton and an electron?
protons are positive (+)
electrons are negative (-)
elements are organized on the ___________________
Periodic Table
properties of matter that you can observe
physical properties
Has no definite volume or shape
gases
Which substances are the same element?
a. H₂ and H₂O
b. O and O₂
c. CH₃ and HC₄
d. N₂ and O₂
b. O and O₂
both contain Oxygen
atoms combine through chemical bonds to form _______
molecules
The father of the modern periodic table was?
A. Ms. Peterson
B. Albert Einstein
C. Dmitri Mendeleev
D. Isaac Newton
C. Dmitri Mendeleev
properties of matter that explain how elements react to each other
can matter change states?
yes
Which statement explains why all elements are different from each other?
a. They were discovered by different scientists
b. They were discovered in different centuries.
c. They have different colors when observed.
d. They are made of different atoms.
d. They are made of different atoms.