"Alkenes can be used to make polymers. Polymers are very large molecules made when smaller molecules join together, end-to-end. The smaller molecules are called Monomers. In general: lots of monomers molecules ----- a polymers molecule"
Answer:
The correct answer would be - strontium, magnesium, beryllium.
Explanation:
As we know that the number of the same valence electrons is most likely to exhibit similar physical and chemical properties so the elements of the particular group in the periodic table have a similar number of physical and chemical properties and a similar number of the valence electrons.
For example, group 2 elements are known as alkaline earth metals, and strontium, magnesium, beryllium, and calcium are the same group elements thus, they have the same chemical and physical properties as they have 2 valence electrons.
Answer:
The negative effects of the destruction on the global environment as well as on the local environment are the following :
1) If forests are destroyed for making commercial area, the habitat of animals are also destroyed.
2) Forest helps in the cleaning of environment by consuming carbondioxide and releasing oxygen. If destruction of forest occurs, the environment remains polluted.
Answer:
In many ways, glasses are like ceramics and have all of their properties: durability, strength and brittleness, high electrical and thermal resistance, and lack of chemical reactivity.
Explanation:
