Vocabulary
A neutral subatomic particle
What is a neutron?
Determines the atomic number
What is the number of protons?
H
What is Hydrogen?
Columns on the periodic table
What are valence electrons?
A negatively charged subatomic particle
What is an electron?
Contains the protons and neutrons of an atom
What is the nucleus?
Na
What is Sodium?
Rows on the periodic table
What are periods?
A bond where electrons are tranferred between atoms
The smallest unit of an element that retains its properties
What is an atom?
The total number of protons and neutrons
What is mass number?
Ne
What is Neon?
The letter in the middle of the block
What is atomic symbol
A bond where electrons are shared unequally
What is a polar covalent bond?
A substance that cannot be broken down chemically
What is an element?
This is arranged but increasing atomic number
The Perodic Table
Li
What is Lithium?
The number over the atomic symbol
A bond where electrons are shared equally
What are covalent bonds?
Atoms of the same element with different numbers of neutrons
What is an isotope?
Electrons have ___________ so they are generally ignored when it comes to calculating atomic mass.
very little (negligible) mass
Kr
What is Krypton?
What is the name of the column of elements on the far right of the table? (He-Rn)
What are noble gases?
An atom that has gained or lost electrons