Structure of an Atom
Protons have a ________ charge.
positive
In the compound NaCl, there are ______ atoms of each element.
one
who created the periodic table?
Dmitri Mendeleev
Electrons have a _________ charge.
Negative
If there is no number behind an element symbol in a compound then there is only ______ atoms of that element.
one.
What is the purpose of the periodic table?
To organize the elements of the world into a simply chart.
These are found in the nucleus of an atom.
Protons and neutrons
Consider the compound:
C6H5N3
How many atoms of Nitrogen are there?
three
what do we call the large letter that represents the name of an atom?
Element symbol
Only this many electrons can be on the first find surrounding the nucleus.
two
(you can not use the periodic table)
Hydrogen
atomic mass
Every atom has the same number of __________ and _________.
Protons and electrons
*Daily Double*
If I have 1 iron atom and 2 chlorine atoms what would the compound be written as?
FeCl2
Why do some elements and atomic symbols what do not match the element? For example: the atomic symbol for iron is Fe.
Because some of the atomic symbols are based off of elements greek orgin.