Vocabulary
Organized list of all known elements that are arranged by increasing atomic number and by changes in chemical and physical properties
Periodic Table
The chemical symbol for Carbon is ____________.
C
___________ uses chemical formulas and symbols to describe a chemical reaction.
How many atoms of hydrogen are in water, H2O?
2
Particle with an electric charge of -1.
electron
What element has the chemical symbol Ca?
Calcium
How many outer electrons do most elements want to become stable?
8
How many atoms of oxygen are in water, H2O?
1
Vertical column in the periodic table
Group
What element has an atomic number of 7?
Nitrogen
Where should you look to determine number of outer electrons?
Group number
Determine the number of oxygen atoms in the following chemical formula: 2H2O2
4
Chemical equation with the same number of atoms of each element on both sides of the equation.
balanced chemical equation
Which group of elements is Neon found in on the periodic table?
Group 18 - Noble Gases
Ionic compounds are usually formed by ionic bonding between metals and nonmetals. Which of the following is an ionic compound?
CO2, H2O, or NaCl
NaCl
The general form A + B --> AB represents what type of chemical reaction?
synthesis
Substance that speeds up a chemical reaction without being permanently changed itself.
How many protons does an atom of Sulfur have in its nucleus? Its chemical symbol is S
16
When sodium and chlorine bond, what compound is formed?
NaCl
Classify the following reaction:
2H2O2 --> O2 + 2H2O
decomposition