Chemistry Core Lesson 1 • http://www.privatehand.com/flash/elements.h tml • All must • Know that all substances are made of atoms. • know and define the term element. • be able to name several elements • be able to find several elements in the Periodic Table . • Most should • Know the layout of the Periodic Table • Be able to use chemical symbols. • http://clipbank/espresso/clipbank/servlet/link?macro=setresour ce&template=vid&resourceID=1618&taxonomyNodeID=731
Chemistry Core Lesson 1. http://www.privatehand.com/flash/elements.html All must Know that all substances are made of atoms. know and define the term element . be able to name several elements be able to find several elements in the Periodic Table. Most should - PowerPoint PPT Presentation
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Chemistry Core Lesson 1• http://www.privatehand.com/flash/elements.html• All must • Know that all substances are made of atoms. • know and define the term element.• be able to name several elements• be able to find several elements in the Periodic
Table.• Most should• Know the layout of the Periodic Table• Be able to use chemical symbols.•http://clipbank/espresso/clipbank/servlet/link?macro=setresource&template=vid&resourceID=1618&taxonomyNodeID=731
Chemistry Core• What is an element?• An element is a single pure substance
which cannot be broken down into anything simpler.
• An element is made of identical atoms.• What is an atom?• Atoms are small spheres.• The atoms of one element are different
from the atoms of every other element.
Where are all elements listed?• In the Periodic Table – a list of all known elements.• Why use symbols?• It’s simpler than writing long names!• Symbols are known all over the world even in
different languages.• E.g. S is always sulphur, even though the Japanese for
sulphur is iwo, the Spanish is azufre and the French is soufre
• Rules For Symbols:• Either one capital letter e.g. C carbon• OR one capital letter and one lower case letter• E.g. Zn zinc
The Periodic Table• The Periodic Table is divided up:• Into metal and non metals – where?• Metals and non metals are separated by a
zig zag starting to the LEFT of Boron – where is this?
• Into Groups – where and why?• Groups are VERTICAL COLUMNS of similar
elements.• Into Periods where?• Periods are HORIZONTAL ROWS.
Conclusion?Elements in the same group of the Periodic Table have similar reactions because they have the same number of electrons in their outer shell.
Heat the metal on the burning spoon.Plunge into gas jar of oxygen as shown.Record observations.http://clipbank/espresso/clipbank/servlet/link?template=vid¯o=setResource&resourceID=1489
Noble GasesGroup 8 or 0Full outer electron shells.Do not form compounds.Uses reflect lack of reactivity.e.g. Argon in light bulbs prevents metal filament from burning.Do glow when electric current is forced through gas at low pressure.
Chemical Reaction• Takes place by• GIVING• TAKING• Or SHARING electrons.
Metal + Non metal• Metals GIVE electrons to non metals.• Atoms become charged IONS.• These attract each other.• http://www.absorblearning.com/media/attac
1. An ionic bond is formed when a metal atom and a non-metal atom combine
2. The metal atom donates an electron to the non-metal atom
3. The metal atom becomes a positively charged ion, the non-metal atom becomes a negatively charged ion
4. The positive ion attracts the negative ion – an ionic bond
Ionic Bonding
Ionic Bonding
Ionic Bonding
Ionic Bonding
Ionic Bonding
Ionic Bonding
Ionic bonding
Ionic Bonding
IONIC BONDbond formed between
two ions by the transfer of electrons
1). Ionic bond – electron from Na is transferred to Cl, this causes a charge imbalance in each atom. The Na becomes (Na+) and the Cl becomes (Cl-), charged particles or ions.
COVALENT BONDbond formed by the sharing of electrons