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B11 vocab science
B11 vocab science 10/17
Question | Answer |
---|---|
Period | Horizontal rows in the periodic table whose properties change gradually and predictivly |
Atomic number | Number of protons in the nucleus of each atom; the top number in the periodic table. |
Atomic mass | Total mass of protons and neutrons in an atom ; it's unit of measure is the atomic mass unit (u) |
Electron | Negitivily charged particle that exists in an electron cloud formation around an atom's nucleus. |
Electron cloud | Region surrounding the nucleus of atom, where electrons are most likely to be found |
Group | Family of elements in the periodic table that have similar physical or chemical properties |
Isotope | Two or more atoms of the same element that have different number of neutrons in their nuclei |
Mass number | Sum of the number of protrons and neutrons in the nucleus of an atom |
Metal | Element that has luster, is metalable and is a good conductor of heat and electricity |
Metalloid | Shares properties of metals and non metals |