What is the transition of phase called when you go from gas to liquid?

A pure substance has a boliing range

What is not a type of mixture?

Which method of separation can be used for a suspension?

'Molecules can be separated from each other using filtration.'

Is this a sentence on micro or on macro level?

The symbol of the element Potassium is:

Which group in the periodic table is called the alkaline earth metals?

Which one is the correct writing for the symbol nitrogen?

Which part of the atom has a positive charge?

If you're talking about isotopes, which amount of the part of the atom is different?

Sodium has atom number 11 and a mass of 23 u.

What is the atom build like?

... C₂H₆O + ... O₂ > ... CO₂ + ... H₂O

Which number has to be filled in before O₂ in the balanced equation?

The next word diagram is an example of what type of reaction?

Water > Hydrogen + Oxygen

Which influence on the rate of a reaction is not because of more effective collissions?

What is the covalency of the element Se?

This molecule is ...