SNC1DW Chapter 5
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SNC1DW Chapter 5
Chapter 5 glossary terms and definitions.
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 an atom.
The positively charged centre of an atom.
A positively charged particle that is part of every atomic nucleus.
An uncharged particle that is part of almost every atomic nucleus.
Areas of space surrounding the nucleus of an atom that electrons occupy.
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.
The average mass of the naturally occurring isotopes of an atom.
A system for organizing the elements into columns and rows, so that elements with similar properties are in the same column.
An element that is hard, shiny, malleable, and ductile, and is a good conductor of heat and electricity.
An element that is not shiny, malleable, ductile, and is a poor conductor of heat and electricity.
An element that shares its some properties with metal 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.
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.