The periodic table
What is the periodic table?
What is a library of information about all chemical elements.
PG#381
What is a valence electron?
What is the outermost electron of an atom that participates in cheamical bonding.
A chemical bond formed when two atoms share one or more pairs of valence electrons is what?
What is covalent bond.
This type of ion is formed when an atom gains one or more electrons.
What is an anion?
This type of chemical compound is formed when a metal reacts with a nonmetal
What is an ionic compound?
What are the scientific names for how the periodic table elements are set up?
What are row and cloumns
PG#381
The number of valence electrons in each atom of an element can determine what?
What is the type and number of bonds it can form.
An atom with less than eight valence electrons becomes stable by forming what?
What is chemical bonds.
A sodium atom becomes a sodium ion by doing this with one of its electrons.
What is losing it?
These are the positively and negatively charged particles that make up ionic compounds.
What are ions?
Metalloids are on what part of the periodic table?
What is the narrow stair-step region.
PG#382
What are the elements in group 18 called?
What are noble gases.
How many valence electrons does a covalent bond contain?
What is two.
These two types of ions are attracted to each other to form an ionic bond.
What are cations and anions?
This strong force holds oppositely charged ions together in an ionic compound.
What is an electrostatic attraction (or ionic bond)?
Poor conductors of thermal energy and electricity is what part of the regions?
What are nonmetals?
PG#382
In 1916 a chemist named what developed a method to show an element's valence electron?
Who is Gilbert Lewis
A double covalent bond exists when two what share two pairs of valence electrons?
What is atoms
This term describes an atom or molecule with a net positive or negative electrical charge.
What is an ion?
Ionic compounds typically have this kind of melting point—high or low?
What is high
What are the three types of regions on the periodic table?
What are metals, nonmetals and metalloids
PG#382
When an atom forms a bond, it does what with other atoms?
What is it gains, loses, or shares valence electrons?
This ion, with the formula SO₄²⁻, is a polyatomic ion commonly found in salts and detergents.
What is sulfate?
When dissolved in water, ionic compounds can do this, allowing the solution to conduct electricity.
What is dissociate into ions (or conduct electricity)