VOCAB
Most atoms join with different atoms in a process called ___.
Chemical Change / Chemical Reaction
This is the most common compound on earth.
Water (H2O)
True or false: stable atoms are likely to form compounds with other atoms.
False
How many eletrons can live in the the second shell and beyond?
Horizontal rows on the periodic table are called ___.
Periods
Which subatomic particle carries a negative charge?
Electrons
This kind of bond occurs when atoms share pairs of electrons.
Covalent Bond
Milk is considered a(n) based on the pH scale score of 6.
___ occur when the number of electrons in an atom doesn't equal the number of protons.
Ions
Adding the protons and neutrons of an atom together gives you the __.
Atomic Mass
Sodium chloride (NaCl) -aka- table salt is created due to what kind of bonds?
Ionic
Bases form what kind of ions?
Hydroxide Ions (OH-)
Some chemical reactions do not result in more complex compounds, but instead break down a complex compound into simpler compounds: this type of chemical reaction is called a(n) ___.
Decomposition Reaction
Originally, the periodic table was arranged based on an element's ___.
Atomic Weight / Mass
Tue or false: most atoms have electron shells that are not completely filled.
True
Some chemical reactions occur when molecules combine to form new substances; this kind of chemical reaction is called a ___.
Synthesis Reaction
These scientists try to find ways to turn common meals, such as iron or lead, into gold.
Alchemists
How many elements are currently found on the periodic table?
118
Gases and liqids are the most likely to contain __ bonds.
Covalent Bonds
What does the superscript in a chemical formula indicate?
How many atoms of that element are found in a molecule.