Definitions
Finding Mass #
Calculating Protons, Neutrons, and Electrons
Lewis Dot Structures
Octet Rule
100
What is Mass Number?
The numbers of protons and neutrons in the nucleus
100
Calculate the atomic number and mass number of an element that is made up of 4 protons, 5 neutrons, and 4 electrons.
4, 9
100
How do you calculate the number of protons?
Number of Protons = Atomic Number
100
What's the first step of drawing Lewis Dot Structures?
a. Locate the valence election number.
b. Give out 1 electron to each side. Once all sides have 1 valence electron- then give another each side.
c. Draw the element's symbol.
c. Draw the element's symbol.
100
What happens to the atom when there are more than 4 valence electrons?
It gains electrons
200
What is the Atomic Number?
The number of proton in the nucleus?
200
An atom has a mass number 23 and an atomic number 11. How many protons, electrons, and neutrons are present in the atom?
200
How to find the number of Neutrons in an isotope?
Subtract the number of protons from the atomic mass of the isotope.
200
What does a Lewis Dot Diagram ONLY SHOW?
Only shows Valence Electrons.
200
What happens to the atom when there are less than 4 valence electrons
It loses electrons
300
What is a Proton?
Atom with the positive charge.
300
The mass number of X is 23 which contains 15 electrons. What is the atomic mass of X?
23 amu
300
How many neutrons are in Chlorine-35?
18 Neutrons
300
Draw the Lewis Dot structure for BeF2
300
How many valence electrons does Magnesium have?
2 Valence Electrons
400
What is an electron?
Atom with the negative charge.
400
A radium 
isotope, on the emission of an 
particle gives rise to a new element whose mass number and atomic number will be:
220 and 86
400
How many neutrons are in Oxygen-17?
9 Neutrons
400
Draw the Lewis Dot Structure for ClF4+
400
How many valence electrons does Oxygen have?
6 Valence Electrons