WorksheetsGrade 9 Chemistry Quiz
Total questions: 10
Worksheet time: 5mins
What is the change of physical state from solid to liquid called?
melting
freezing
condensation
sublimation
Choose the element from the list below.
Water
CO2
Magnesium
Salt
How can we separate sand from a sand-water mixture?
Crystallisation
Filtration
Chromatography
An atom has 4 protons and 5 neutrons. What is the atomic number?
4
5
9
How many electrons can the first shell hold?
2
8
18
All the elements in the same group have ...
The same number of protons.
The same number of valence electrons.
As we move down group 1, the alkali metals ... in reactivity.
increase
decrease
As we move down group 7, the halogens ... in reactivity.
increase
decrease
We use dot and cross diagrams to draw ...
Simple molecules
Giant structures
The most abundant gas in the atmosphere.
N2
O2
CO2
Argon
