Building Blocks Of Matter
Reading the Periodic Table
Using the Periodic Table
Law of Conservation of Mass
Physical and Chemical Properties
Mixtures
100
positively charged particles in an atom
protons
100
atomic number of an element can be defined as
number of protons in an atom
100
good conductor of heat and electricity
copper
100
How many atoms are in the compound CH4
5
100
a chemical property of a sheet of paper
the paper can be burned
100
pure substance located on the periodic table
element
200
negatively charged particles in an atom
electrons
200
The atomic mass unit or mass number is determined by
adding up the number of protons and neutrons that are in an atom
200
group 18 in the periodic table
the noble gases
200
how many atoms are in the compound H2SO4
7
200
Two different liquids are poured together in a container, immediately after bubbles begin to form. This is an indication that what has happened?
chemical change
200
composed of 2 or more pure substances bonded together by shared electrons
compound
300
subatomic particle that is located outside of the nucleus
electrons
300
How many neutrons are in the element Na?
12 neutrons
300
lustrous and brittle
silicon
300
True or false: water is a compound
true
300
True or false:
ice melting is a physical change
true
300
a substance made up of 2 or more chemical components not bonded together chemically
mixture
400
Like charges ____________ while opposite charges ___________.
repel, attract
400
Which is the number of electrons for Na?
11
400
has properties of both metals and nonmetals
boron
400
Changes that elements or compounds undergo to become a new substance is called a
chemical reaction
400
An ice cube is placed in a heated pan. As the ice begins to melt what is occurring?
physical change
400
A salt (NaCl) is a pure substance, which is an example of _________.
compound
500
the basic unit of matter and is the smallest particle of an element
atoms
500
how Dmitri Mendeleev arranged the periodic table
increasing atomic number from left to right
500
gas at room temperature
helium
500
A substance that begins a chemical reaction on the left side of the arrow is called
reactants
500
using a sieve to separate mixtures based on component size
filtration
500
Aluminum foil is a pure substance and is an example of ____.
element
600
the region around the nucleus where electrons orbit
electron cloud
600
the atomic mass of oxygen
16
600
when a mixture is submerged into a liquid some particles will rise to the surface
flotation
600
what is consumed during a chemical reaction
reactants
600
used to separate dissolvable solids from liquids
condensation and evaporation
600
A granite countertop is made from the rock granite, it is an example of ______.
heterogenous mixture
700
small, dense center of an atom
nucleus
700
What is the atomic number of Na?
11
700
Whipped cream is composed of tiny particles evenly distributed throughout, it is an example of____.
homogenous mixture
800
subatomic particle in the nucleus of an atom with a neutral charge
neutron
800
What is the atomic mass unit or mass number of the element?
22.99
800
used to separate magnetic materials and non-magnetic materials
magnetism