Science chapter 5
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Science chapter 5
The smallest particle of an element that retains the identity of the element
A negatively charged particle within the atom
A particle that is smaller than the atom
In chemistry, the oisitively charged centre of an atom
A positively charged particle that is part of everystomic nucleus
An uncharged particle that is part pf almost every atomic nucleus
A possible level of energy an electron can have in an atom
the number of protons in the nucleus of an atom
the sum of the number of protons and the number of neutrons in the nucleus of an Atom
one of two or more forms of an element that have the same number of protons but a different number of neutrons
a model of the atom in which a central positive nucleus is surrounded by electrons in energy levels
The average mass of the naturally occuring isotopes of an element
A system for organizing the elements into columns and rows, so that elements with similar properties are in the same columns
Typically, an element that is hard, shiny, malleable, and ductile, and is a good conductor of heat and electricity
typically, an element that is not shiny, malleable, or ductile, and is a poor conductor of heat and electricity
An element that shares some properties with metals and some properties with non-metals
A horizontal row of elements in the periodic table
a vertical column of elements in the periodic table
Found in Group 1. They have low melting points and are highly reactive.
Alkaline earth metal
Found in Group 2. They are also highly reactive, but less so than Alkali metals. They are often used in fireworks since they produce colourful flames.
Found in group 17. These non-metals are highly reactive and extremely corrosive.
Found in group 18. These non-metals are all odourless, colourless gases at room temperature. However, they are non-reactive.
An electron in the outermost occupied energy level of an atom