The Atom
What are the three subatomic particles?
Protons
Electrons
Neutrons
Group number
Covalent bonds ____ electrons.
Share
True or False?
Coefficients are numbers at the bottom of the chemical symbol.
False.
They start a chemical formula.
What are examples of evidence of a chemical change?
Creation of something new (bubbles, ash)
New properties (color or temperature change)
What subatomic particles are located in the nucleus?
Neutrons
Ionic bonds ___ electrons.
Transfer
Subscripts are numbers at the beginning of a chemical formula.
False.
Subscripts are numbers at the bottom left of a chemical formula.
Burning is a chemical change.
True
Where are electrons located?
The electron cloud on the orbitals/energy levels.
Vertical columns in a periodic table are called...
Groups
dot ; valence
How many Oxygen atoms are in this formula?
K2(O2)3
6
How to count atoms:
List atoms separately
Count # of atoms in each molecule
If subscript is outside parentheses, multiply the outside subscript and the inside subscript
Multiply each atom by the coefficient
True or False?
Slicing lemons is a chemical change.
False
Name a type of atom model.
Bohr
Rutherford
Electron Dot Diagram
alkali metals, alkaline earth metals, transition metals, post-transition metals, metalloids, halogens, noble metals, and noble gases
Bonds follow the ____ rule. This mean they try to have total of of ____ electrons on the outermost orbital/energy level.
How many total atoms are there in this chemical formula?
2K2Be4
12
True or False?
Ripping paper is a physical change.
True
What are the charges of protons, neutrons, and electrons?
PROtons = positive
NEUtrons = NEUtral
ElectroNs = Negative
Listen to your teacher's question carefully.
Listen for your teacher's answer carefully.
Which type of bond requires higher temperatures and CAN conduct electricity?
Ionic bonds
What common household item does this formula represent?
NaCl
Table Salt
True or False?
Baking soda into vinegar is a physical change.
False