Periodic Table
Atoms
Molecules/Elements
Everything Matters
Chemical Reactions
100
how many elements are on the periodic table?
118
100
The smallest part of a substance that cannot be broken down chemically
Atom
100
when two or more atoms bond together chemically
molecule
100
The 3 states of matter
solid, liquid, gas
100
In a closed system the mass of a chemical reaction will decrease
false
200
How is the periodic table organized?
Atomic Number
200
The 3 subatomic particle that make up an atom
protons, neutrons, electrons
200
a pure substance made up of only one type of atom, each with the same number of protons
element
200
the state of matter with the fastest moving particles
gas
200
This law states that mass is never created or destroyed but transformed
conservation of mass
300
if an element has an atomic number of 17 how many protons and electrons does it have?
17
300
This subatomic particle has a negative charge
electrons
300
What is water an example of?
molecule
300
This makes up everything in the world
matter
300
When a chemical reaction occurs new matter is created? True or False, explain if false
False, the matter is transformed into a new substance
400
What do the period numbers on the periodic table tells us about an element?
how many orbitals surround the nucleus
400
the electrons on the outermost orbital ring
valence electrons
400
Chlorine is an example of a/an______________
an element
400
states of matter with a definite shape and volume
solid
400
a substance that is present at the beginning of a chemical reaction and undergoes a change to form a new substance
reactant
500
The architect of the periodic table
Dmitri Mendeleev
500
What is the name of this type of model?
Bohr's Model
500
What equation do you use to find the neutrons in an element
atomic mass- atomic number
500
state of matter has definite volume but no definite shape.
liquid
500
Hydrogen + Oxygen = Water
What are the products and reactants of this equation
Hydrogen and oxygen= reactants
water= product