Matter unit test Flashcards
The odour of a substance is a chemical property, True or false?
False
The diagram suggest that the marshmallow on the left has a lower density than the marshmallow on the right.
True
String peanuts in a popcorn produces a heterogeneous mixture
True
If an element is a gas at room temperature it is likely to be a metal.
False
According to Bohr’s theory, the maximum number of electrons in each of the first three orbits in atoms are respectively two, eight and ten
False
The Bohr – Rutherford diagram shown represents a cation
False
Behaviour in water (solubility] is an example of physical property
True
A flame test can be used to identify an unknown metal.
True
Electrolysis breaks down water into oxygen and hydrogen gas
True
Goggles maybe taking off if a student has finished their experiment and is cleaning up
False
A heavy weight is hung from two equal length of wire of the same diameter, but different composition. Wire A breaks immediately, but wire B stretches and thins significantly before breaking. this shows that
Wire B is more ductile
Which observation is qualitative?
The material is very flexible
Which would be the least viscous?
Water
Passing electricity through liquid table salt produces sodium metal and chlorine gas. This experiment shows the table salt is
A compound
Which element is likely to react violently with water?
Cesium
Which statement is correct?
Nah is more reactive than Mg