chemistry matter atoms and bonding

what is sublimation

• gas to solid

• liquid to solid

• solid to gas

• gas to liquid

Tags

NGSS.MS-PS1-4

what is desublimation

• solid to gas

• liquid to gas

• solid to liquid

• gas to solid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

why does the temperature stay constant when a substance undergoes a state change?

• not releasing energy

• energy being used to break the bonds

• thermal energy converted into kinetic energy to break the bonds

• particles are losing energy

Tags

NGSS.MS-PS1-4

what’s a compound only made of one type of atom called

• pure

• impure

what is a substance made of more than one element chemically joined together

• pure

• impure

in chromatography, why must the baseline be drawn in pencil?

• it is soluble

• pen will bleed up

• it is insoluble

what is done to make sure the substance doesn’t dissolve in water

• solvent above the baseline

• solvent below the baseline

Rf value:

• less than 1

• distance by solvent/distance by spot

• more than 1

• distance by spot/distance by solvent

what is the theory that all atoms were solid spheres

• Dalton

• JJ Thompson

• Rutherford

• Plum Pudding

percentage by mass equation

• (RFM/mass)x100

• (mass/RFM)x100