Chemistry Topic 4 Quiz
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A quiz on topic 4- How atoms combine.
- 1.What is an element?
- A.
A substance made of two or more different atoms chemically joined together.
- B.
A substance made of only one type of atom.
- C.
A group of non-metal atoms which are chemically joined together.
- D.
I don't have a clue.
- 2.Which of these is a diatomic element?
- A.
Calcium
- B.
Gold
- C.
Hydrogen
- D.
Phosphorus
- 3.What is a compound?
- A.
A substance made of only one type of atom.
- B.
A substance made of two or more different atoms chemically joined together.
- 4.Why are noble gases different from other non-metal elements? (choose 2 answers)
- A.
They do not exist as molecules, but as single atoms.
- B.
They are very reactive.
- C.
They are very un-reactive.
- D.
They exist as molecules.
- 5.Each atom of every noble gas has an outer energy level which is
- 6.Atoms of non-metal elements (except noble gases) obtain a stable electron arrangement like the noble gases by chemically joining with other non-metal atoms. What are the forces of attraction which hold these atoms together called?
- A.
Bridges
- B.
Joints
- C.
Bonds
- 7.When is a covalent bond formed?
- A.
When two non-metal atoms share a pair of protons
- B.
When two non-metal atoms share a nucleus.
- C.
When two non-metal atoms share a pair of electrons.
- D.
When two non-metal atoms share a pair of neutrons.
- 8.The nucleus, in the centre of an atom, has which charge?
- A.
Positive
- B.
Negative
- C.
Neutral
- 9.When is a double bond formed?
- A.
When a pair of electrons is shared between three atoms.
- B.
When two pairs of electrons are shared between two atoms.
- C.
When an electron is shared between two atoms.
- 10.
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What is the shape of this molecule called?- A.
Linear
- B.
Planar
- C.
Pyramidal
- D.
Tetrahedral
- 11.What do the following prefix's mean: Mon- , Di-, Tri-, Tetra-
- A.
Mon- means 1, Di- means 2, Tri- means 4, Tetra- means 3
- B.
Mon- means 1, Di- means 2, Tri- means 3, Tetra- means 4
- C.
Mon- means 2, Di- means 4, Tri- means 3, Tetra- means 1
- D.
Mon- means 4, Di- means 2, Tri- means 3, Tetra- means 1
- 12.What information is given by the symbols in a formula?
- A.
The elements in the molecule.
- B.
The size of the molecule.
- 13.What information is given by the numbers in a formula?
- A.
The size of the molecule
- B.
The amount of each element present in the molecule.
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