Flashcards
Atomic Structure
Flashcards do conjunto (10)
- 1ElementsMade up of small particles called atoms.
A substance which atoms are of one kind only.
a substance which cannot be broken into simpler substances.
Classified as: naturally occurring or man made, solid, liquid or gas, metals or non-metal. - 2Periodic TableThe elements are arranged in the Periodic Table in increasing atomic number. Metals are all on the left side of the zigzag line whereas non-metals are on the right. The Periodic Table can be divided into rows called periods and columns called groups.
- 3Periodic Table GroupsElements with similar chemical reactions are arranged in the same column or group.
Group 1 the Alkali Metals are very reactive and are stored under oil.
Group 7 the Halogens are reactive non-metals.
Group 0 the Noble Gases are very unreactive.
Transition Metals are the group in the middle of the Periodic Table between group 2 and 3 - 4Compounds MixturesCompounds form when two or more elements are chemically joined together.
Mixtures when two substances are joined together but don't chemically join. - 5Structure of Atomssmall positively charged nucleuses
negatively charged electrons - 6Proton, Electron, NeutronParticle Location Charge Mass
Proton In the nucleus +1 1
Neutron In the nucleus 0 1
Electron Outside the nucleus -1 0 - 7Electron arrangementArranged in energy levels.
The first energy level may contain up to 2 electrons
The second energy level up to 8 electrons
The third up to 18 electrons - 8Atomic and Mass NumberThe atomic number is the number of protons in an atom.
Protons and neutrons in an atom is known as the mass number. - 9Isotopes and Relative Atomic MassIsotopes have the same atomic number but a different mass number.
Relative atomic mass of an element is the average atomic mass taking into account the proportion of each isotope. - 10IonsIons are formed when atoms gain electrons to make negative ions or when atoms lose electrons to form positive ions.
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- National 4/5 Chemistry (Unit One) FlashCards sobre Atomic Structure, criado por Lucy Aird em 15-04-2016.
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- Lucy Aird
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