Periodically!
How you can you tell the number of valence electrons?
What is group number
A type of bond that requires a transfer of electrons from one element to another
What is an ionic bond?
How many protons, neutrons and electrons are in Calcium?
p+=20
n= 20
e-= 20
This particle gives an atom a negative charge
What is an electron?
This ancient Greek philosopher believed there was no such thing as atoms. Instead he believed all matter was made up of the four elements; earth, wind, water and fire
Who is Aristotle?
Chemistry is the study of matter. What is matter?
Matter is anything that has mass or takes up space. The stuff that makes up everything.
Cl + Li --> ClLi
Show the ions produced from this reaction
Li+1
Cl-1
How many subatomic particles are in Silicon
p+=14
n= 14
e-= 14
When an atom loses this it becomes more negative
What is a proton?
This scientist determined protons exist in the nucleus but most of the atom is empty space.
Who is Rutherford?
The atomic number tells you this
What are the number of protons and electrons?
A Lewis dot diagram shows what?
What are the number of valence electrons
OR
The number of electrons in the outer most shell
Determine the total charge:
p+= 14
n= 14
e-= 10
+4
all elements in a group have this in common
What is the number of electrons in the outer shell?
This scientist created the "plum pudding" model (aka chocolate chip cookie model)
Who is Thomson
Horizontal rows in the Periodic table are called
Ca + O --> CaO
Show the ions produced during this reaction
Ca+2
O-2
How many subatomic particles are in an atom of Chromium?
p+=24
n= 28
e-= 24
An atom with a positive or negative charge due to a loss or gain of electrons is called?
An ion
This scientist said all matter is made of atoms that are indivisible and all atoms of a given element are identical in mass and properties.
Who is Dalton?
Vertical columns on the periodic table are called what?
What is groups
Na + O --> Na2O
Show the ions produced during this reaction
[Na+1]2 O-2
Determine the total charge:
p+= 23
n= 23
e-= 26
-3
Atoms of the same element with a different number of neutrons
What are isotopes?
This Greek philosopher was the first person to use the term atom
Who was Democritus?