Properties of Atoms
Periodic Table
Elements and Compounds
Chemical Formulas
Chemical Reactions
100
Makes up all matter.
What are atoms?
100
Elements are arranged according to atomic number.
What is the arrangement of the periodic table?
100
This cannot be broken down by physical means.
What is an element?
100
S O C Fe H
What are element symbols?
100
Not easily reversed
New products
Bubbles or precipitate formed
What are physical changes?
200
Protons, electrons, and neutrons.
What are the subatomic parts of an atom ?
200
Elements that share properties of metals and nonmetals.
What are metalloids?
200
This substance has different properties than their elements.
What are compounds?
200
2C 3H 4Fe
(numbers in front of the letters)
What are coefficients of molecules?
200
Easily reversed
No new products
Can also change colors
What are examples of physical changes?
300
This subatomic has a positive charge and is the identity of an atom/element.
What is the proton?
300
These are the columns of the periodic table and the elements in those columns have similar properties.
What are groups or families?
300
The water and salt are two examples of substances that have formed chemical bonds.
What are examples of compounds?
300
H2O CO2 C6H12O6
(numbers below the letters)
What are the subscripts- the number of atoms?
300
The substances that are produced in a chemical reaction.
What are the products in a chemical reaction?
400
These particles of the atom sit on the outer most shell.
What is/are valence electrons?
400
These are the rows and they indicate the number of energy shells of the element.
What are periods on the periodic table?
400
What is carbon dioxide (a compound)?
400
14
2H2OSO4
What is the number of atoms in the formula?
400
The starting substances in a chemical reaction.
What are the reactants in a chemical formula?
500
This subatomic particle is negatively charged and can be the same number as another subatomic particle.
What is the electron?
500
I have 26 protons, 26 electrons, and 30 neutrons.
What is the element Fe, Iron.
500
Elements are made of identical atoms, where compounds are made of identical molecules.
What is the difference between elements and compounds?
500
1
H2O
What is the number of molecules of the formula?
500
The reactants and the products contain the same number of atoms/molecules of each element.
What is a balanced equation? (matter is neither created or destroyed, only rearranged)