| The Atom | Organizing the Elements | Metals | Nonmetals, Inert Gases, Semimetals | Radioactive Elements |
| 10 | 10 | 10 | 10 | 10 |
| 20 | 20 | 20 | 20 | 20 |
| 30 | 30 | 30 | 30 | 30 |
| 40 | 40 | 40 | 40 | 40 |
| 50 | 50 | 50 | 50 | 50 |
| Final Question | ||||
True or False: all elements located in the same period will have the same number of valence electrons in the outer shell
True or False: all elements located in the same period will have the same number of valence electrons in the outer shell
False; same group
In an atom the number of protons equals the number of _____
In an atom the number of protons equals the number of _____
electrons
Mendeleev created the first periodic table by arranging elements in order of ____
Mendeleev created the first periodic table by arranging elements in order of ____
increasing atomic mass
What is found in the nucleus of an atom
What is found in the nucleus of an atom
Protons and Neutrons
Atoms of the halogen family typically gain __ electron(s) when they react.
Atoms of the halogen family typically gain __ electron(s) when they react.
1 electron
Flourine Chlorine Bromine and Iodine are a part of which family
Flourine Chlorine Bromine and Iodine are a part of which family
Halogens
True or false: Because bromine is a nonmetal halogen, you can predict that it is liquid at room temperature
True or false: Because bromine is a nonmetal halogen, you can predict that it is liquid at room temperature
False
What information in the periodic table indicates the number of protons in an atom
What information in the periodic table indicates the number of protons in an atom
the elements atomic number
What is the atomic number of Phosphorus
What is the atomic number of Phosphorus
15
How many neutrons are in Aluminum
How many neutrons are in Aluminum
14
True of False: most metals are liquid at room temperature
True of False: most metals are liquid at room temperature
False
What does it mean if a material is ductile?
What does it mean if a material is ductile?
can be pulled or drawn in a long wire
On the periodic table the most reactive metals are found where
On the periodic table the most reactive metals are found where
Group 1, first column on the left
What are the two most common Alkaline Earth metals
What are the two most common Alkaline Earth metals
calcium and magnesium
If an element reacts violently with water, in which group is it likely to be found
If an element reacts violently with water, in which group is it likely to be found
Group 17
Which group of elements share characteristics with both metals and nonmetals
Which group of elements share characteristics with both metals and nonmetals
semimetals
What is the most useful property of semi metals?
What is the most useful property of semi metals?
the varying ability to conduct electric current
The zig zag line is a major group of elements called ____
The zig zag line is a major group of elements called ____
semi metals or metalloids
The elements that do not ordinarily form compounds are called _____
The elements that do not ordinarily form compounds are called _____
inert gases
Why would it be difficult to determine the chemical and physical properties of a newly discovered synthetic element
Why would it be difficult to determine the chemical and physical properties of a newly discovered synthetic element
the elements nuclei would break apart quickly
The spontaneous emission of radiation by an unstable atomic nucleus was named ______ by marie currie
The spontaneous emission of radiation by an unstable atomic nucleus was named ______ by marie currie
radioactivity
What did Henri Becquerel discover?
What did Henri Becquerel discover?
radioactive decay
Radioactive isotopes called ___ can be used to detect some medical problems
Radioactive isotopes called ___ can be used to detect some medical problems
tracers
During this process, unhealthy human cells are destroyed
During this process, unhealthy human cells are destroyed
radiation therapy
A radioactive isotope that can be followed through the steps of a chemical reaction is a(n) ______.
A radioactive isotope that can be followed through the steps of a chemical reaction is a(n) ______.
tracer
Locate the box in group 18 in the 4th period. Predict the state of matter and the chemical reactivity of the element that belongs in that box.
Locate the box in group 18 in the 4th period. Predict the state of matter and the chemical reactivity of the element that belongs in that box.
it is an inert gas so it is in a gas state and it does not normally react with other elements because it is stable (8 valance electrons)
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