Vocab Test 6
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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Neutron
Neutrally charged subatomic particle
Proton
The positively charged subatomic particles.
Electrons
Negatively charged subatomic particle
Nucleus
Located in the center of an atom that contains protons and neutrons.
Electron cloud
Area where electrons are found
Atom
The building blocks of matter.(smallest unit of matter)
Atomic #
The number of protons in a nucleus / element number
Chemical symbol
The letters that represent the element.
Mass #
The number of protons plus the number of neutrons
Isotope
An atom with a different number of neutrons
Element name
Name of the element
Periodic table
A chart of elements organized by atomic number that shows patterns of properties.
Periods
Horizontal rows on p.t that shows patterns in properties.
Groups
Vertical columns that show similar characteristics
Energy levels
The maximum amount of energy available in each orbital.
Valence shell electron
Electrons found in the outermost energy shell.