periodic table trends
How does the number of the element correspond with the atomic number?
they are the same.
what is the oxidation number in hydrogen
-1
when do chemical reactions occur?
two or more molecules interact and change
Name P^4S^5
Tetraphosphorus Pentasulfide
Name the compound given the formula: BaCO^3
Barium Carbonate
how many groups are in the periodic table?
18 groups.
are metal charges positive or negative
positive
What type of chemical reactions takes place when melting of a solid occurs
endothermic reaction
When is it not okay to use "mono" in a covalent compound?
At the beginning of the first element
Derive the formula from the name of this polyatomic ion "Hydroxide"
OH-
How many periods are in the periodic table
Seven periods.
at room temperature, how many solids are there on the periodic table?
104 solids
define exothermic reaction
releasing heat
how are covalent compounds made up?
Name the compound formula of "Ammonium Fluoride"
NHF^4
how does the amount of protons correlate with the atomic number
the atomic number is equal to the amount of protons
When making a Lewis Dot Structure, what are the dots around the atomic symbol portrayed of?
Valence electrons
definition of ionic bond
attraction between oppositely charged ions
how many pairs of electrons can compounds share?
up to three.
What is a binary ionic compound?
representative metals, two ions of different elements
how many states of matter are there?
how many metals are in the periodic table
70 metals
name 3 characteristics of an ionic bond
high melting points, brittle, good insulators
what is the only kind of molecules covalent molecules can form?
Diatomic molecules- two of the same element
Name the formula "NaCl"
Sodium Chloride