Atomic Structure
Periodic Table
Chemical formulas and equations
Counting Atoms
Random
100
This is the building blocks of all matter
Atoms
100
What is the atomic number for Fe
26
100
The starting substances of a chemical reaction are called
Reactants
100
How many atoms of Sodium are in this chemical formula NaCl
1
100
All of the atom's weight can be found here
Nucleus
200
This subatomic particle can be found in the electron cloud
electrons
200
Atomic number is the same as the number of
Protons
200
The subscript tells you what
The number of atoms
200
How many atoms of Hydrogen
2H + HCL
3
200
This is the simplest element on the periodic table
Hydrogen
300
This subatomic particle has a positive charge
protons
300
Atomic numbers increase in increments of _____ on the periodic table
1
300
What is the coefficient
4NaOH2
4
300
What is the total number of atoms 3CO
6
300
Which equation is the reactant 2HCl -----> H + 2Cl
2HCl
400
These subatomic particles are located in the nucleus
protons and neutrons
400
All elements on the periodic table are considered this
a pure substance
400
The coefficient tells you _____
number of molecules
400
When a chemical equation has parenthesis with a subscript next to you should know to do this?
Multiply
400
What is the most abundant element in Earth's atmosphere?
Nitrogen
500
What is the charge of the nucleus
positive
500
How many neutrons does Fe have
30
500
NaOH+ HCl is called a
Chemical equation
500
Matter cannot be created nor destroyed is known as this
The law of conservation of matter
500
In this chemical formula 4NaCl what does the 4 tell you?
How many molecules of NaCl are present or that you have 4 molecules of NaCl