WorksheetsDiagnostic Test A Level Chemistry
Total questions: 20
Worksheet time: 8mins
What are the positively charged particles in an atom?
Protons
Neutrons
Electrons
Nucleon
Anything that takes up space and has mass is known as _______________.
Matter
Molecules
Compounds
Atom
Which of the following symbols identifies a substance dissolved in water?
(s)
(l)
(g)
(aq)
A(n) ____________________ is a pure substance made of a single type of atom and cannot be broken down.
Element
Compound
Molecule
Mixture
What does the ATOMIC MASS tell us about an atom?
Protons + Neutrons
Protons + Electrons
Neutrons + Electrons
What is an element?
Two or more atoms joined together.
One of over 100 types of atoms
Two or more different elements joined together.
A particle with no charge found in the nucleus of an atom.
What is a molecule?
two elements bonded together (sharing electrons)
a mixture of different substances
smallest individual particles
salt mixed in water
What is a compound?
the simplest form of a substance
a combination of 2 or more elements
a combination only of 3 elements
Two substances stuck together with glue.
What two subatomic particles are found in the nucleus?
proton and electron
electron and neutron
neutron and proton
neutron and electron
Which of the following statements regarding subatomic particles is incorrect?
Protons are positively charged particles and neutrons have no charge
In a neutral atom, the number of protons equals the number of electrons
The relative mass of proton, electron and neutron the same
Isotopes of an elements have the same number of protons but a different number of neutrons
Eight atoms of element X have the same mass as two atoms of Tellurium. What is the relative atomic mass of X [RAM Tellurium : 128]
8
16
32
64
Four isotopes of lead include lead-204, lead-206, lead-207, and lead-208. The average atomic mass of lead is 207.2. Which isotope of lead is likely to be the most abundant.
204
206
207
208
The chemical formula of potassium hexacyanoferrate (III) is K3Fe(CN)6 . What is the relative formula mass?
RAM [K=39, Fe=56, C= 12, N= 14]
121
199
251
329
The formula of a compound is M(OH)2 . Given that the Mr of the compound is 98, calculate the Ar of M.
32
64
81
94
The most common chemicals used in our daily life is table salt. What is the chemical term for the table salt?
potassium oxide
potassium chloride
sodium chloride
sodium oxide
Which of the following electron arrangement of an atom has eight electrons valence?
2.6
2.8.8
2.8.2
2.8.8.2
The melting point and boiling point of substance M is -37oC and 5oC respectively. The physical state of substance M at room temperature is
gas
solid
liquid
gas and liquid
PCl5 is a chemical formula of a substance. What is the name of the substance?
Phosphorus pentachloride
Phosphorus chlorate
Phosphorus trichloride
Phosphorus chloride
Diagram shows the symbol of X atom. What is the electron arrangement for ion of X?
2.8
2.8.2
2.8.1
2.8.8.5
A solution consists of two parts. One part is the substance that is dissolved. What is the name of this part of a solution?
solvent
solute
solution
oxygen
