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Are radioactive substances the last period of elements (at the bottom of the chart)?
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How many elements in the first period?
Period 1: 2 elements Period 2: 8 elements Period 3: 8 elements Period 4: 18 elements Period 5: 18 elements Period 6: 32 elements Period 7: 25 elements
Are the elements in period 1 reactive?
They all react, but Cesium would be the most reactive, since francium is radioactive we don't consider francium the most reactive.
What is the heaviest radioactive element?
Polonium is often considered to be the most radioactive element, but there are far more radioactive elements like nobelium and lawrencium. However, the most radioactive elements are man-made like ununtrium and ununseptium. Out of these, ununoctium is the most radioactive but scientists are continuing to make even more radioactive elements today.
What is the family name of for Technetium?
Transition metals. in fact, it is the Only radioactive transition metal!
What are the properties of radioactive decay?
Radioactive decay has the following properties: 1. No element can completely decay. 2. The number of atoms decaying in a particular period is proportional to the number of atoms present in the beginning of that period. 3. Estimate of radioactive decay can be made by half life and decay constant of a radioactive element.
The period of elements that are all radioactive?
All elements comprising the period 7 in the periodic table are radioactive. In total this period has 32 elements.
Which group contains only radioactive elements?
The actinoids (formerly actinides) are all unstable metallic elements. The period 7 elements with atomic numbers from 89 (actinium, for which the group is named) through 103 comprise these elements. A link can be found below.
Synthetic elements comprise a majority of which of the following groups?
Artifficial radioactive elements are situated in: - period 7 - actinoids (actinides) family
What are the radio active rare-earth metals located at the bottom of periodic table?
actinide: 15 metallic chemical elements with atomic numbers from 89 to 103 Actinium, Thorium, Protactinium, Uranium, Neptunium, Plutonium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium, Lawrencium
What period on the periodic table of elements contains radioactive elements and what are they called?
it was found in 1896. you can not find them on the periodic table. you may find some, but often some are.
What is second period at the bottom of the periodic table called?
The first period is at the top of the table. It consists of hydrogen and helium. The bottom period is period 7.
Which of these four radioactive elements would you choose to date a fossil from the most recent epoch?
Four elements are not mentioned but fossils contain organic material that means carbon compounds so carbon-13 isotope is more suitable, in case of radioactive elements that isotope is most suitable which have the half life period in millions of years.
What determines the number of electrons found in each period In the periodic?
there are more electrons in the elements on the bottom of the table.
How many elements are in the 1st row of the periodic table?
In the Periodic Table of Elements there are: 118 Observed Elements 114 Officially Discovered Elements 112 Officially named Elements 92 Naturally Occuring Elements 83 Non-radioactive elements
How many elements in the first period?
Period 1: 2 elements Period 2: 8 elements Period 3: 8 elements Period 4: 18 elements Period 5: 18 elements Period 6: 32 elements Period 7: 25 elements
Are the elements in period 1 reactive?
They all react, but Cesium would be the most reactive, since francium is radioactive we don't consider francium the most reactive.
Where is polonium located?
1. Polonium is a very rare radioactive element accompanying uranium ores. 2. In the Mendeleev table of elements polonium is situated in the 6th period.
