periodic table
This element has 3 valence electrons and less protons than Magnesium.
Boron
How are elements arranged on the periodic table?
According to atomic number
Which element contains more energy, Boron or Aluminum?
Aluminum
Give me the chemical symbol for Group 15, period 4 element:
Arsenic
This element has three energy levels and 2 valence electrons.
Magnesium
Elements in the second group have 2 outer shell electrons and are also very reactive. They are called
alkalai earth metals
Elements in the first group have one outer shell electron and are extremely reactive. They are called
alkalai metals
What is the name of the particle that has a negative charge and is located outside the atom's nucleus?
electron
The vertical columns on the periodic table are called
groups
Elements in group 17 are known as "salt formers". They are called
halogens
The elements at the bottom of the table were pulled out to keep the table from becoming too long. The first period at the bottom called the
lanthanides
What is the name of the particle that has a positive charge and is located in the atom's nucleus?
proton
The atomic number is the same as the
protons
What is the number of protons, neutrons and electrons in Bromine?
protons = 35 electrons = 35 neutrons = 44.904 or 45
How many valence electrons are in Bromine?
7
This Group 2 element has fewer protons than Bromine, but more than sulfur.
Calcium
Describe the process you would use to determine the amount of neutrons in 1 atom of an element.
Determine the number of protons (atomic #) and subtract this from the atomic mass (which is protons + neutrons)
Which Groups contain metals so active that they are mainly found in compounds, and rarely "pure"?
Group 1 and 2 (alkalai and alkalai earth metals)
This element is the smallest element in the Noble Gas family
Helium
This element is the only non-metal on the left side of the staircase.
Hydrogen
This element is in the Halogen family and has 5 energy levels.
Iodine
Why is hydrogen placed in the position that it is within the periodic table?
It has 1 VE, but it has nothing else in common with group 1.
Do elements in Period 2 share characteristics? Explain.
NO. For instance, you have Potassium (a highly reactive metal) in Group 1, period 4. If you read across this period you will come across: transition metalsmetalloidhalogennoble gas. They do have the same amount of energy levels, but this does not predict the actual characteristics of an element (reactive, nonreactive, metal/non, etc).
This Group 2 element has more protons than Carbon but less than Oxygen.
Nitrogen
How many protons are in the element at the position Group 2, period 7?
Radium
This element has more neutrons than any other Noble Gas.
Radon
Which Noble Gas has the most energy shells?
Radon
Describe the process you would use to determine the number of valence electrons in 1 atom of an element.
Read the group # from the periodic table. The group number is the same as the number of valence electrons. For groups 13-18, drop the 1. Ex: Group 13 has 3 VE, Group 14 has 4 VE, etc.
This period 3 element is in the Carbon Family
Silicon
What is a metalloid and list the elements that fall into this classification.
These are elements that have some properties of metals and some properties of nonmetals. They are on either side of the 'staircase' (except Aluminum)
Why are valence electrons important?
These are the electrons involved in bonding
This Alkaline Earth metal has a higher atomic number than Rubidium but less neutrons than Rhodium.
Strontium
Do elements in the Noble Gas family share characteristics?
They do. All members of a group (except Hydrogen and pd 1) share characteristics. Group 8, Noble gases, all have 8 outer electrons (VE), which means they are all stable and do not bond readily. The outer shell of each these elements is already full.
Write a clue for Neon.
This element is in group 18 and has 2 shells.
This element has a atomic number greater than Copper but less than Gallium.
Zinc
The second period at the bottom of the table is called the
actinides
The elements that touch the zigzag line are classified as
metalloids
Most of the elements in the periodic table are classified as
metals
What is the name of the particle that has no charge and is located in the atom's nucleus?
neutron
Elements in group 18 are very unreactive. They are said to be "inert". We call these the
noble gases
Which elements are noble gases and why is "8 great"?
noble gases have complete outer shells. The octet rule is achieved and they do not bond because they are already stable. Stable atoms have 8 electrons in the outer shell.
The elements in the far upper right corner are classified as
non-metals. Most upper right corner starts noble gases.
Is hydrogen a metal or nonmetal?
nonmetal
The horizontal rows on the periodic table are called
periods
Elements in groups 3 through 12 have many useful properties and are called
transition metals
The group number is the same as the
valence electrons