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118 chemical elements have been identified and named officially by IUPAC.A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z).
The Preamble to the United States Constitution, beginning with the words We the People, is a brief introductory statement of the Constitution's fundamental purposes and guiding principles. Courts have referred to it as reliable evidence of the Founding Fathers' intentions regarding the Constitution's meaning and what they hoped the Constitution ...
Periodic Videos (also known as The Periodic Table of Videos) is a video project and YouTube channel on chemistry. It consists of a series of videos about chemical elements and the periodic table , with additional videos on other topics in chemistry and related fields.
Read below for the full text of Lincoln's address: Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition ...
The events of the constitutional convention of 1787 and the Constitution of the United States that emerged from it are the topic of this song, with the lyrics of the chorus directly quoting the constitution's preamble and setting it to music. A small section of the preamble was cut to make the song scan better.
The twenty-three articles have been reorganized into a cohesive document containing seven articles, a preamble and a closing endorsement, of which Gouverneur Morris was the primary author. [8] The committee also presented a proposed letter to accompany the constitution when delivered to Congress.
The amendment as proposed by Congress in 1789 and ratified by the states: No person shall be held to answer for a capital, or otherwise infamous crime, unless on a presentment or indictment of a Grand Jury, except in cases arising in the land or naval forces, or in the Militia, when in actual service in time of war or public danger; nor shall any person be subject for the same offence to be ...
Atoms of one element can be transformed into atoms of a different element in nuclear reactions, which change an atom's atomic number. Historically, the term "chemical element" meant a substance that cannot be broken down into constituent substances by chemical reactions, and for most practical purposes this definition still has validity.