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