Vocabulary
How was the first Periodic Table arranged?
By atomic mass
True or False. Electrons are counted in the atomic mass.
False
Draw an atom diagram for the element Sulfur
16 Protons, 16 electrons, 16 Neutrons
True or False- The periodic table arranges elements with similar properties into columns.
True
How many neutrons are in the element Arsenic (As)?
Atomic Mass - Atomic Number 75-33= 42 neutrons
The ___________ of an element tells how many protons it has.
Atomic Number
Protons: 50
Neutrons: 69
Electrons: 50
Tin (Sn)
What is the atomic mass for Pt?
Platinum: 195.078
What is the element name for the chemical symbol Hg?
Mercury
How many electrons are in a neutral atom of Calcium (Ca)?
20 electrons, same as the number of protons
The smallest unit of an element that still has the properties of the element is an _____________.
Atom
What two subatomic particles are found in the nucleus?
protons and neutrons
How many neutrons does chemical symbol NO have?
156
Helium, Neon, Argon, Krypton, Xenon, Radon
What is the atomic mass of Bromine (Br). Round to the nearest whole number.
80
What are the three subatomic particles that make up an atom and their charges?
Proton-positive, Neutron-no charge, Electron-negative
What is the formula you use to calculate the number of neutrons in an atom?
atomic mass-atomic number=number of neutrons
What is the chemical element for Sg?
Seaborgium
What is the chemical symbol for the element Dubnium?
Db
How many neutrons does Copper (Cu) have in its nucleus?
64-29=35 neutrons
The center of every atom and contains at least one proton.
Nucleus
How many electrons can fit in the first 3 electron shells of an atom?
1st ring=2
2nd ring=8
3rd ring=8
How many electrons does Os have?
76
Identify the electrons, protons and neutrons for the element Silicon (Si).
Protons: 14
Electrons: 14
Neutrons: 14
99