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.
Kenya's eastern and northern neighbors are Somalia and Ethiopia. To the northwest lies the Sudan. Many inhabitants of the Sudan's border region are in fact ethnically related to Kenya `s peoples. To the west lies Uganda and to the south, Tanzania, both nations that share with Kenya a history of British colonial rule.ocation Kenya is positioned on the equator on Africa's east coast. Its northernmost and southernmost points are approximately equidistant--a little over 40 north and south of the equator. Kenya shares borders with five other countries.