magnesium has a melting point of 650 degrees celsius, is silvery white, and is reactive with hydrogen in water. It is capable of forming alloys with other metals and has a density of 1.74g/cm3 classify the 5 properties mentioned as either physical or chemical property. Then explain how you know the difference

Chemical property : It is reactive with hydrogen

Physical property : magnesium has a melting point of 650 degrees celsius, It is silvery white,  it has a density of  ,   It is capable of forming alloys with other metals

Explanation:

Chemical property is defined as the property of a substance which is observed during a reaction where the chemical composition identity of the substance gets changed.  

Example: It is reactive with hydrogen

Physical property is defined as the property which can be measured and whose value describes the state of physical system. For Example: State, density etc.  

Example: 1. magnesium has a melting point of 650 degrees celsius,

2. It is silvery white.

3.  It is capable of forming alloys with other metals

4. It has a density of

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary

answer: they produce more slow than unicellular organisms.