07 This question is about elements.
Caesium is in Group 1 of the periodic table.
0 7
1
Explain what happens to caesium atoms and to oxygen atoms when caesium reacts
with oxygen to produce caesium oxide.
You should answer in terms of electrons.
[4 marks]

law of conservation of matter

the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

hope this :