Introduction to ATOMS. Electrons are always on the move.

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Presentation transcript:

Introduction to ATOMS

Electrons are always on the move.

Neutrons and protons are held together in the nucleus by the “strong” force, which has to overcome the electrical repulsion of the positively charged protons.

Electrons are held around the atom by the electrical attraction between their negative charge and the positive charge of the protons in the nucleus.

Protons = positive charge + Neutrons = neutral charge = no charge Electrons = negative charge - + -

The Periodic Table shows the Symbol, ATOMIC number, ATOMIC weight, and the name of each ELEMENT. SYMBOL ATOMIC NUMBER ATOMIC WEIGHT NAME H Hydrogen

HYDROGEN Hydrogen has an Atomic number of 1. Hydrogen has an Atomic weight of The symbol for hydrogen is H. H HYDROGEN

HELIUM Helium has an Atomic number of 2. Helium has an Atomic weight of 4.00 The symbol for Helium is He. He HELIUM

LITHIUM Lithium has an Atomic number of 3. Lithium has an Atomic weight of 6.94 The symbol for Lithium is Li. Li LITHIUM

BERYLLIUM Beryllium has an Atomic number of 4. Beryllium has an Atomic weight of 9.01 The symbol for Beryllium is Be. Be BERYLLIUM

BORON Boron has an Atomic number of 5. Boron has an Atomic weight of The symbol for Boron is B. B BORON

CARBON Carbon has an Atomic number of 6. Carbon has an Atomic weight of The symbol for Carbon is C. C CARBON

NITROGEN Nitrogen has an Atomic number of 7. Nitrogen has an Atomic weight of The symbol for Nitrogen is N. N NITROGEN

OXYGEN Oxygen has an Atomic number of 8. Oxygen has an Atomic weight of The symbol for Oxygen is O. O OXYGEN

FLUORINE Fluorine has an Atomic number of 9. Fluorine has an Atomic weight of The symbol for Fluorine is F. F FLUORINE

NEON Neon has an Atomic number of 10. Neon has an Atomic weight of The symbol for Neon is Ne. Ne NEON NUCLEUS