Part 1
The place where known elements are represented
What is the periodic table?
_______ are represented in the Periodic Table of Elements with one or two letter chemical symbols.
What is an element?
Where is the mass of an element located on the element box?
at the bottom
What two elements is the atmosphere comprised of?
What is nitrogen and oxygen?
What is the atomic number for cobalt?
27
The solid portion of Earth is made up of oxygen and this element.
What is silicon?
The symbol for oxygen is __________.
O
What is the number of protons for the element Na?
11
What is the numbers in formulas called? ex. H2O
What is a subscript?
What group is lithium in?
a. metals
b. non-metals
c. metalloids
A
A pure substance that cannot be broken down into simpler substances
What is an element?
Where is the symbol of an element located?
At the top of the box
What is the number of neutrons for Na?
(M)23- (A)11=12 neutrons
What is the chemical symbol for magnesium?
Mg
What group is silicon in?
a. metals
b. non-metals
c. metalloids
C
A substance that consists of two or more different elements
What is a compound?
What mnemonic device do we use to figure out the number of neutrons?
What is MAN?
Is H2O an element or a compound?
compound
What is the formula for table salt?
NaCl
What group is Chlorine in?
a. metals
b. non-metals
c. metalloids
B. non-metals
is the smallest particle of an element that maintains the chemical identity of the element.
What is an atom?
What mnemonic device do we use to remind us that the atomic number = the number of protons =the number of electrons?
APE
How many elements are in this formula? NaCl
2
What is the number of electrons for the element potassium?
19 (APE)
You will find only elements on the Periodic table of elements. True or False
True