VOCABULARY
These are substances containing only one type of atom.
What are elements?
Atoms are referred to as this if their outer shell is closed.
What is stable?
These compounds form hydrogen ions when they are dissolved in water.
What are acids?
Scientists use this to abbreviate elements.
What is a chemical symbol?
This is the process in which atoms join with different types of atoms.
What is a chemical reaction?
These structures have a positive charge.
What are protons?
These bonds are created when atoms share electrons.
What is a covalent bond?
These compounds form hydroxide ions when dissolved in water.
What are bases?
The periodic table is broken up into ____ and ____, terms for the vertical and horizontal lines on the table.
What are periods and groups?
This type of reaction occurs when molecules combine to form new substances.
What is a synthesis reaction?
This is a "recipe" scientists use to determine what is in a molecule.
What is a chemical formula?
This type of bond occurs when atoms exchange electrons.
What are ionic bonds?
These bases dissolve in water.
What are alkalis?
The colors on the periodic table tell us what information?
What are metals, nonmetals, and metalloids?
This reaction occurs when compounds break down into two or more simpler compounds.
What are decomposition reactions?
This number identifies the number of protons in the nucleus.
What is an atomic number?
An atom that has either lost or gained an electron is referred to as this.
What is an ion?
These are strong acids that can dissolve metals and other elements/molecules.
What are corrosive acids?
Elements on the table are organized by this.
What are atomic masses?
Solutions with a pH of 7.0 are considered to be this.
What is a neutral?
This structure of an atom has 0 weight.
What is an electron?
These elements are typically stable and, therefore, cannot bond with other atoms.
What are noble gasses?
This scale is used to determine the concentration of an acid or base in a solution.
What is a pH scale?
Elements in the same group have this in common.
What are the same number of electrons in the outer shell?
These substances change color when exposed to acids or bases.
What are indicators?