Atomic Structure
Periodic Table
Physical/
Chemical Properties
Chemical Properties
Law of
Conservation of
Matter
Conservation of
Matter
Why does it matter?
100
Where are the electrons found in an atom?
In electron shells/clouds/rings on the outside of the nucleus.
100
How are elements arrange in the periodic table?
The elements are arrange in order of atomic number or number of protons.
100
What is the difference between a chemical and a physical change?
A physical change can be reversed and a chemical change cannot be reversed easily.
100
What is the simplest unit of matter?
An atom
100
How many protons are in Phosphorus?
15
200
What are the three subatomic particle (small particles) that make up an atom?
Protons and Neutrons make up the nucleus of the atom and the electrons are found outside the nucleus.
200
What is the difference between a group and a period?
Groups form vertical columns and periods are horizontal rows.
200
What are three signs of a chemical change?
Color change,
Formation of a gas,
Temperature change, and
Formation of a precipitate
200
Why do atoms bond?
To become stable and have a full octet or 8 valence electrons.
200
How many Neutrons does Argon have?
22
300
Draw the Bohr Model of Boron
300
What is the most reactive group of nonmetals?
The Halogens
300
In an exothermic Reaction
energy is released
300
Balanced or Unbalanced
Unbalanced
300
How many valence electrons are in Sulfur
6
400
What subatomic particle do we use to identify an atom?
Protons
400
Why are the Noble Gases considered stable?
Each element in the Noble gases has a full outer electron shell or have at least 8 valence electrons.
400
What are three physical properties of a metal?
Conductivity,
Malleability,
Magnetism, and
Luster
400
Balance the following formula
N2 + 3H2
400
What term best describes the change in temperature during a chemical reaction that causes the products to become cold?
(energy os absorbed)
Endothermic Reaction
500
Draw the Bohr's Model for Potassium
500
List the following elements in order of their reactivity. Start with the most reactive and move to the least reactive.
Ca , C, Br, K, He
K, Ca, Br, C, He
500
Do physical changes produce compounds or mixtures?
Mixture
500
What is one fact that will always be true about the reactants and the products of a chemical reaction?
The number of atoms in the reactants and the number of atoms in the products are the equal.
The mass of the reactants and the mass of the products are equal.
500
How many elements and how many total atoms are in this formula?
3 elements
Al-2
S-3
O-12
total- 17