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Chemical level

chapter 2

QuestionAnswer
Elements all matter is composed of basic substances called
92 of the 112 different elements, how many occur naturally
26 how many of the naturally-occurring elements are found in the body
Carbon, Hydrogen, Oxygen and Nitrogen 96% of the body's mass (weight) is composed of
Each elements is composed of tiny particles called atoms
The structure, or anatomy, of an atom is atomic structure
The two main areas of an atom are nucleus and shell or orbits
The nucleus contains 2 subatomic particles which are protons and neutrons
The orbit contains one type of subatomic particle which is electrons
Electrons have a ______ charge, while neutrons have a ________ charge negative, neutral
In a neutral atom, the number of electrons will equal the number of protons
atoms of different ________ contain different number of protons elements
the number of protons in an atom equal atomic number
The # number of protons neutrons = ne The # of proton + atomic weight
are atoms of he same element, with the same atomic number, but different atomic weights isotopes
Most atoms will combine with other atoms to form molecules
Atoms combine together by a process called bonding
what causes bondng electron
When an atom bonds it will gain, lose or share electrons
the first shell closest to the nucleus can hold a maximum of ______electrons two
The 2nd shell closest to the nucleus can hold a maximum _____electrons eight
the 3rd shell closest to he nucleus can hold a maximum _______ electrons eights
when an atom will lose a single electron to become stable, it is called an ________, and will become a positive ion electron donor
a positive ion is also known as cation
a negative ion is also known as anion
Created by: breawnsmith
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