metals and non-metal............ metalloids are inbetween (mix of both)
mass and matter
there are two main types of nucleic acids- ribonucleic acid and deoxyribonucleic acid, abbreviated as DNA and RNA respectively.
Scarce , farrier
gxgd
Alphine
marshesswamps
what are the two main types of environment
there are two main types the marine and freshwater
The two main types of economy are Command and Traditional.
The two main types of friction are kinetic and static.
the two main types of communications are emailing and socialising
The two main types of friction are kinetic and static.
what are the two main types of environment
mass and element
The two main types of rockets are, Solid Fuel and Liquid Fuel
The main types are Serial and Parallel.
element and molecules
Metallic and non-metallic.