Atom Parts
What number do you use to find the number of protons?
atomic number
What are the elements in group 18 called?
Noble Gases
What is an ion?
a charged atom
C-14 has how many neutrons?
8
Molecular compounds for between these elements.
Nonmetals
These make up the mass of an atom.
neutrons and protons
What happens to the reactivity in water of the Alkali metals?
It increases as you move down the column.
What elements form ionic compounds?
metal and nonmetal
A positive ion is known as a ...?
Cation
The prefix for 5.
penta
What does neutral mean?
No charge, equal protons and electrons.
What did Mendeleev use to arrange elements in the periodic table?
Properties (physical and chemical)
A negative ion
anion
Write the formula for aluminum hydroxide.
Al(OH)3
Name this: SO3
sulfur trioxide
Describe valence electrons.
Electrons in the outermost energy level, or shell.
What does the 2nd digit of the column number correspond to?
The number of valence electrons.
What happens between cations and anions?
They attract
iron(ll) sulfate
Describe a single bond.
Sharing 2 electrons.
What is an isotope?
An atom with the same number of protons but different number of neutrons.
Explain why Mg forms a 2+ ion.
It loses its 2 valence electrons to become stable.
List three major properties of ionic compounds.
brittle
high melting point
soluble
Write the formula for copper(ll) chlorite hexahydrate
Cu(ClO2)2 . 6H2O
Write the name of CCl4
carbon tetrachloride