Atomic Structure
What is an atom?
The most basic part of matter.
What is the element name for H?
Hydrogen
What is an isotope?
Atoms of the same element with a different mass
What is the mass of an atom?
Protons + Neutrons
What is a group?
Vertical
What is a proton?
Positively charged
What is the symbol for Silicon?
Si
What 3 things stay the same for isotopes?
Atomic number, protons, and electrons
What is the unit of measure for an atom?
Atomic Mass Unit
What is a period?
Horizontal
Where are protons and neutrons located?
In the nucleus of the atom
What is the symbol for Potassium?
K
What is the only thing that changes for isotopes?
Neutrons
What is the mass of Carbon-12?
12 AMU
How many groups are on the Periodic Table of Elements?
18
What is a valence electron?
Electrons on the outermost energy level of the atom
This element is the exception to the metal -> metalloid -> nonmetal on the Periodic Table of Elements?
Hydrogen
You can find the number of neutrons by adding mass plus the atomic number. True or False
False
Yes. They are so small in comparison to protons and neutrons.
How many periods are on the Periodic Table of Elements?
7
Why is a valence electron important?
It determines the chemical properties and behavior of the element.
What is the name of the element for Pb?
Lead
What is the mass, # of protons, #of neutrons, and # of electrons in Carbon-14?
6 protons
8 neutrons
6 electrons
Why does the atomic mass increase as you go down the Periodic Table of Elements?
The number of energy levels which means that the atom will be larger.
What is the atomic number?
It is the number of protons and electrons of an atom.