CALCIUM

TABLE OF CONTENTS

• Introduction: 1-4
• Diagram: 5
• Protons & Neutrons: 6
• Notations: 7
• History of Calcium: 8

TABLE OF CONTENTS (CONT.)

• Appearance and physical state of calcium: 9
• Is it common in nature ? (10)
• Common uses;pure sample: 11
• Health effects & environmental effects:12
• Compounds of calcium: 13

INTRODUCTION

• Calcium has a symbol Ca.
• The atomic number is 20
• The atomic weight is 40.078.

DIAGRAM

PROTONS AND NEUTRONS

NOTATIONS

• Electron configuration is [AR]4s2
• Orbital notion:[AR]4s2
• They are shown with arrows or circles

HISTORY OF CALCIUM

APPEARANCE AND PHYSICAL STATE OF CALCIUM

• Pure form: Rough, shiny, and looks like rocks.
• It is a solid.

IS IT COMMOM IN NATURE ?

COMMON USES; PURE SAMPLE

• It is used to help make cement.
• To make a pure sample of calcium you have to use electrolysis.

HEALTH EFFFECTS & ENVIRONMRNTAL EFFECTS

• Calcium is toxic to aquatic organisms.
• Creates stronger bones
• Helps strengthen your teeth

COMPOUNDS OF CALCIUM

• Calcium Carbibe, Formula: Ca CO3 Uses: Lamps
• Oxide Formula: CaO Uses: Ceramics, Plastics, & Glass

GLOSSARY

• Aquatic organism- Organisms defined as "Fish"
• Electrolysis- A electric current going through liquid.
• Atomic Number- The number of protons.
• Atomic Weight- Another term for atomic mass.
• Cement- a powdery substance made with calcined lime & clay.

GLOSSARY (CONT.)

• Protons- A positively charged particle.
• Neutrons- A particle with 0 charge.
• Solid- are usually hard and molecules are packed together.
• Element- contains atoms that have the same number of protons
• Compound- two or more elements that are bounded together.