Section 1
Write the following in scientific notation form for 0.005?
5 x 10^ -3
The scientist used the gold foil experiment that discovered the nucleus
Ernest Rutherford
How many elements were originally put into the first periodic table
23
What is the basic formula of a chemical reaction
Reactants ----> Products
What was the theory of the structure of an atom when the cookie dough analogy was used
Chocolate chips electrons spread out, the dough empty space
Write the following in standard form for: 3.75 x 10^2
375 (move the decimal two points to the right)
Which scientist is responsible for the "onion" analogy
Neil Bohr's
By increasing atomic mass (but this did not follow for all elements)
What is a chemical reaction?
A process by which one or more substance changes into a new substance
What are the three types of subatomic particles
Electrons, protons, and neutrons
Democritus was the first philosopher who had a hypothesis on what an atom would look like. What was his theory?
Solid, no protons, electrons, neutrons, indestructible
What are the three subatomic particles of an atom?
Electrons, protons, and neutrons
What are the three main groups of elements in the periodic table?
Metals, metalloids, and nonmetals
What does the Law of Conservation state
That mass cannot be created nor destroyed
List the protons, electrons, neutrons, mass, and charge of the atom
P- 8
E- 8
N- 9
Mass- 16
Charge- +1
Who is known as the father of chemistry?
Antoine Lavoisier
What type of charge does an electron have?
NEGATIVE
METALS
What are a few indications of a chemical reaction
- Energy released as heat
-Formation of gas
-Formation of odor/color
Define the types of chemical reactions:
Synthesis-
Decomposition-
Single Replacement-
Synthesis- combine
Decomposition- break down
Single Replacement- one element switches places
What is the atomic mass of an atom?
The sum of protons and neutrons of an atom
When we have an isotope of an atom, what changes in the number of subatomic particles?
Neutrons
Which group of elements in the periodic table are nonreactive and considered to be stable.
What does the arrow represent in a chemical reaction
Balance:
___ K + ___ B2O3 —> ___ K2O + ___ B
_2__ K + __1__ B2O3 ---> __1__ K20 + ___2_ B