Atoms
Name all 3 subatomic particles.
Protons Neutrons Electrons
How many periods are shown on the periodic table?
7
what is the speed of a reaction called?
Reaction Rate
How are ions formed?
By losing or gaining valence electrons
What are the 3 main states of matter?
Solid, liquid, gas
What number do you use to find the number of protons?
atomic number
What are the elements in Group 18 called ?
Noble Gases
in order to have a chemical reaction you need 2 things, S_______ E______ and O_______
Sufficient Energy and Orientation
Will oxygen accept or donate electrons? How many?
Accept two electrons
What is the formula for density?
Density = Mass/Volume (Mass over volume)
What is the atomic number of neon (Ne)?
10
Fluorine, chlorine, bromine, and iodine belong to the family of ______________
halogens
The energy needed to start a reaction is called
Activation Energy
The Oxide ion has _____e-
10 e-
C-14 has how many neutrons?
8
Where are the electrons in the Quantum model of the atom?
Probably in the energy levels
What is a valence electron?
Electron in the outermost energy level
What is the function of a catalyst?
Decreases the activation energy
Elements with the same number of protons but different number of neutrons
Isotope
1 mole of Li has a mass of 7 grams. How many moles are in 21 grams?
3 moles
The sum of protons and neutrons in the nucleus of an atom is known as the _________
Mass number
How many electrons are in the 2nd energy level? (2nd circle)
8
What is formed from a collision or chemicals?
Activated complex
A negatively charged ion
Anion
What is the formula mass of NaCl?
23g + 35g = 58g
What is in the nucleus in the atom?
protons and neutrons
When moving from left to right across the periodic table, what increases?
Atomic Number
What type of energy we store in chemical bonds?
Potential energy
What early model of the atom did Thomson develop that involved a lump of positive charge with electrons stuck to it?
Plum-Pudding Model
The process of colliding two or more molecules together to form new molecule(s).
Collision Theory