atoms
The basic unit of a chemical element
What is an atom
a change that the state of matter changes or the way it looks change but it doesn't chemically change
what is a physical change
to arrange elements by their properties
What is the use of the periodic table
can not be broken down any further, found on the periodic table
What is an element
how many elements are on the periodic table
118
neutrons
These are located in the nucleus and have no charge
a change that transforms one substance into another substance has to be chemically separated
Chemical change
atomic number, chemical symbol, and atomic mass
What is the information in the squares on the periodic table
a mixture where the composition is uniform throughout
what is a homogeneous mixture
is the equation balanced H2 + O2 = H2O
No it is not balanced
protons
What are the positive charged particles in the nucleus.
In a physical change you can physically separate it.
In a chemical change you have to chemically change it.
what is the difference between chemical and physical and chemical changes
one of the main reasons certain elements are grouped together
What are the valance electrons
is chocolate being added to milk and stirred a homogenous or heterogenous mixture
what is homogenous mixture
how do you find density
Density= M/V
electrons
what are the negative charged atoms in the atom that move around the nucleus
Is dissolving sugar in water a physical change or chemical change
What is a physical change
the metals
What is the largest group of elements on the periodic table
charcoal
what is an element
the law that states that mass can be neither created or destroyed
What is the law of conservation of mass
What is the nucleus, neutrons, protons, electrons
what are the parts of the atoms
when you light a candle is it a physical or chemical change
What is both
What are specific types of elements
air
what is a compound
How many atoms are in (NH4)3(HCO)3
24 total atoms