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2.1 ATOMS
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- 1WHAT ARE ATOMS?THE FUNDAMENTAL BUILDING BLOCK OF ALL MATERIALS; IT CONSISTS OF A CLUSTER OF PROTONS AND NEUTRONS SURROUNDED BY A CLOUD OF ELECTRONS.
- 2HOW CAN YOU SEE ATOMS?YOU CAN SEE ATOMS THROUGH STM ( SCANNING TUNNELLING MICROSCOPE)
- 3HOW MANY TYPES OF ATOMS ARE THERE?=118 TYPES OF ATOMS
- 4HOW MANY ARE NATURAL AND HOW MANY ARE MAN-MADE?=98 NATURAL
=20 MAN-MADE - 5WHAT ARE MOLECULES AND GIVE SOME EXAMPLES?A CLUSTER OF ATOMS THAT MAKES UP AN ELEMENT OR A COMPOUND;WATER.
- 6WHAT IS A CRYSTAL LATTICE?A GRID-LIKE STRUCTURE OF ATOMS OR IRONS IN WHICH EACH PARTICLE IS BOUNDED TO ALL OF ITS NEIGHBOURING ATOMS.
- 7EXAMPLE OF CRYSTAL LATTICE.A GRAIN OF BEACH SAND.
- 8WHAT IS AN ELEMENT?A SUBSTANCE MADE UP OF ONLY ONE TYPE OF ATOM.
- 9He2 PROTONS, 2 ELECTRONS, 2 NEUTRONS
- 10O8 PROTONS,8 ELECTRONS , 8 NEUTRONS
- 11WHAT IS THE ONLY NON METALLIC ELEMENT THAT CAN FORM CRYSTAL LATTICES?ION
- 12WHAT IS A COMPOUND?A PURE SUBSTANCE THAT IS MADE UP OF TWO OR MORE DIFFERENT TYPES OF ATOMS CHEMICALLY JOINED.
- 13WHAT IS THE ATOMIC NUMBER?THE NUMBER OF PROTONS IN NUCLEUS; THE ATOMIC NUMBER DETERMINES WHAT TYPE OF ATOM IT IS.
- 14WHAT IS THE MASS NUMBER?THE NUMBER OF PROTONS AND NEUTRONS IN AN ATOM.
- 15WHAT IS THE CHARGE OF AN ATOM?NEUTRAL.
- 16WHAT IS A CATION?AN ION THAT HAS FEWER ELECTRONS THAN PROTONS AND IS POSITIVELY CHARGED.
- 17HOW IS A CATION FORMED?Cations (positively-charged ions) and anions (negatively-charged ions) are formed when a metal loses electrons, and a nonmetal gains those electrons. The electrostatic attraction between the positives and negatives brings the particles together and creates an ionic compound, such as sodium chloride
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- Year 8 Sciences Fichas sobre 2.1 ATOMS, creado por Nasteho Ali Mohamed el 06/05/2019.
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- Nasteho Ali Mohamed
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