SNC1DW Chapter 5

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  1. Atom
    The smallest particle of an element that retains the identity of the element.

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  2. Electron
    A negatively charged particle within the atom.

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  3. Subatomic particle
    A particle that is smaller than an atom.

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  4. Nucleus
    The positively charged centre of an atom.

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  5. Proton
    A positively charged particle that is part of every atomic nucleus.

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  6. Neutron
    An uncharged particle that is part of almost every atomic nucleus.

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  7. Energy levels
    Areas of space surrounding the nucleus of an atom that electrons occupy.

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  8. Atomic Number
    The number of protons in the nucleus of an atom.

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  9. Mass Number
    The sum of the number of protons and the number of neutrons in the nucleus of an atom.

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  10. Isotope
    One of two or more forms of an element that have the same number of protons but a different number of neutrons.

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  11. Atomic Mass
    The average mass of the naturally occurring isotopes of an atom.

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  12. Periodic Table
    A system for organizing the elements into columns and rows, so that elements with similar properties are in the same column.

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  13. Metal
    An element that is hard, shiny, malleable, and ductile, and is a good conductor of heat and electricity.

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  14. Non-metal
    An element that is not shiny, malleable, ductile, and is a poor conductor of heat and electricity.

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  15. Metalloid
    An element that shares its some properties with metal and some properties with non-metals.

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  16. Period
    A horizontal row of elements in the periodic table.

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  17. Group
    A vertical column of elements in the periodic table.

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  18. Alkali metals
    Found in Group 1. They have low melting points and are highly reactive.

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  19. Alkaline-Earth metals
    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.

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  20. Halogens
    Found in group 17. These non-metals are highly reactive and extremely corrosive.

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  21. Noble gases
    Found in group 18. These non-metals are all odourless, colourless gases at room temperature. However, they are non-reactive.

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  22. Valence electrons
    An electron in the outermost occupied energy level of an atom.

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Card Set Information

Author:
Jaimin_Jethva
ID:
273812
Filename:
SNC1DW Chapter 5
Updated:
2014-05-09 01:38:29
Tags:
science chemistry
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Description:
Chapter 5 glossary terms and definitions.
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