Elements, compounds Flashcards
What is the name for substances made of only ONE type of
atom?
Elements
What is the name for substances made of two or more types
of atoms NOT chemically bonded together?
Mixtures
What is the name for substances made of two or more types
of atoms chemically BONDED together?
Compounds
What is the formula for water?
H2O
What is the formula for Methane?
CH4
Define “alloy”
A mixture of a metal and at least one other element
Different sized atoms _____the regular rows so
that the layers can’t slide over each other
distort
What is the word for an element that always exists (naturally) as two
atoms bonded together?
Diatomic
Is an alloy an element, compound or mixture?
Mixture
What is the formula for glucose?
C6H12O6
Which elements exist diatomically?
N2, H2, O2 and all of group 7
How many electrons can be held in the first shell and then
second and third shell of an atom?
First shell is TWO, all other shells EIGHT
What is the different between Ar (relative atomic mass) and
Mr (relative molecular mass)
Ar = for an element Mr = for a compound
Define “ion”?
An electrically charged atom that has gained or lost
electrons
How do you calculate Ar of an element
It is it’s mass number
