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
In the diagram shown of a planetary atom, the indicated particle is
An electron
Of the following, which is a molecular element?
Nitrogen gas
The Bohr – Rutherford diagram shown represents a
+1 ion
Which molecular model is the best representation of NH three?
Model three
You cannot see through a brick but you can see through a window
Optical clarity
Copper and aluminum are easily drawn out into wires
Ductility
A smooth polished metal surface is shiny and can be used as a mirror
Lustre
Gold can be hammered into sheets as thin as tissue paper
Malleability
A bulb will not produce light when connected to a battery with nylon fishing line
Electrical conductivity
A bar of soap is easily scratched with a fingernail
Hardness
Honey pours much more slowly than alcohol
Viscosity
This element has two electrons in its outer orbit, and it belongs to the second period
Beryllium
This element’s most common isotope has a mass number of four and two neutrons per atom
Helium
This element has eight electrons in its outer orbit, which is the second orbit.
Neon
The outermost electrons of this element lion the fourth orbit, and it has chemical properties similar to magnesium.
Calcium
This element has for electrons in its outer most orbit and it has the smallest atomic mass of the elements in its group
Carbon
This elements outermost electrons line the second orbit, and it is the most reactive non-– metal in its period
Fluorine
This element is the most reactive metal of the top four elements in its group, and it has chemical properties similar to lithium
Potassium
Lithium
Li
Sodium
Na
Beryllium
Be
Fluorine
F
Neon
Me
List any three of the five points of the particle theory of matter
One. Matter is made up of tiny particles that leave space in between them
Two. The particles are always in constant random motion
Three. The particles move faster as the temperature increases.
What does WHMIS mean? Draw to safety symbols and explain how they show
Workplace hazardous materials information system
