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Elements, Isotopes and Ions- How Atoms Differ

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Table 7

on 5 February 2014

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Transcript of Elements, Isotopes and Ions- How Atoms Differ

Ions
An atom is neutral because it has an equal number of protons and electrons. When it gains or loses and electron, it becomes an ion. An ion is an atom that is no longer neutral because it has either gained or lost electrons. There are two types of ions; positive ions and negative ions.
Different Elements
Isotopes
Isotopes are atoms of the same element that contain different numbers of neutrons. Most elements have more than one isotope, so each element has an atomic mass, or weighted average mass of the mixture of an element's isotopes.
Positive Ions
An atom that loses an electron has positive charge, which makes it a positive ion.
Positive ions have more protons than electrons.
Positive ions are represented by the element's symbol and a superscript plus sign.

Negative Ions
An atom forms negative charge when it gains an electron. This makes it a negative ion.
Negative ions have more electrons than protons.
A superscript minus sign shows a single negative charge.
Elements, Isotopes and Ions- How Atoms Differ
By Fenina Gonzales, Maranda Azurin
and Anthony de Leon

Atomic Number and the Periodic Table
early greek philosophers thought of matter as combinations of four basic elements
element- is the pure substance made from atoms.
atomic number- the numbers of protons in an atom
elements in the periodic table are arranged horizontally in order of increasing atomic numbers
in the periodic tables the blocks
Isotopes of Hydrogen
The atomic number of hydrogen is 1. The most common type of hydrogen is called protium. Two other hydrogen isotopes are deuterium and tritium. Protium,
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