Vocabulary
The atomic number is the number of ____________ in an atom.
protons
The vertical rows on the periodic table are called
groups
H2O
2
Hydrogen Oxygen
H2O
3
2 Hydrogen 1 Oxygen
Point to Zinc on the periodic table.
Zn
The __________________ is the center of the atom.
nucleus
The horizontal rows on the periodic table are called
periods
NaCl
2
Sodium Chloride
NaCl
2
What is the element symbol for Zinc?
Zn
Has NO CHARGE
neutron
An element is placed on the periodic table according to its
atomic number
CaCl2
2
Calicum and Chlorine
CaCl2
3
1 Calcium
2 Chlorine
What is the atomic mass for Zinc?
65.39
Has a positive charge
protons
Find the atomic number Helium.
2
CO2
2
Carbon
Oxygen
CO2
3
1 Carbon
2 Oxygen
What is the atomic number of Zinc?
30
Atomic mass =
protons + neutrons
Find the Atomic number for sodium (Na).
11
C8H10N4O2
4
Carbon Hydrogen Nitrogen Oxygen
C8H10N4O2
24
8 Carbon + 10 Hydrogen + 4 Nitrogen + 2 Oxygen
How many neutrons does Zinc have?
35
65-30 = 35
AM - AN = Neutrons