Reactions and compounds. New substances are formed by chemical reactions. When elements react together to form compounds their atoms join to other atoms using chemical bonds. For example, iron and sulfur react together to form a compound called iron sulfide.Mixture of iron (grey) and sulfur (yellow) powders.hen elements react, their atoms join with other atoms to form compounds [compound: A compound is a substance formed by the chemical union (involving bond formation) of two or more elements. ] . Chemical bonds form when this happens, which involves atoms transferring or sharing electrons.
The 'red land' was the barren desert that protected Egypt on two sides. These deserts separated ancient Egypt from neighbouring countries and invading armies. They also provided the ancient Egyptians with a source for precious metals and semi-precious stones.
Arab Republic of Egypt enjoys a strategic location in the northeast corner of the African continent. Egypt shares its boundary with Mediterranean Sea in the North, Sudan in the South, Israel and Red Sea in the East and Libya in the West.Egypt has played a major role in transportation between the continents of Africa, Asia and Europe due to its important geographical location.The approximate land area of Egypt is 9,97,738 sq km and it is 1085 km north to south and 1255 km east to west.rab Republic of Egypt enjoys a strategic location in the northeast corner of the African continent. Egypt shares its boundary with Mediterranean Sea in the North, Sudan in the South, Israel and Red Sea in the East and Libya in the West.