Lesson Worksheet: Covalent Bonds Science
In this worksheet, we will practice describing the formation of covalent bonds in simple molecules.
Q1:
Which of the four numbered elements could react together and form a covalent compound?
- A2 and 3
- B1 and 2
- C1 and 3
- D3 and 4
- E2 and 4
Q2:
Which statement correctly describes covalent bonding?
- AStatement 1
- BStatement 2
- CStatement 3
- DStatement 4
Q3:
A molecule of oxygen () can be represented in different ways to show the double covalent bond present between the two oxygen atoms. Which of the following formulas correctly shows a molecule of oxygen?
- A
- B
- C
- D
- E
Q4:
Ammonia gas is an important chemical in the production of fertilizers. It is made during the reaction of nitrogen and hydrogen, and it has the chemical formula .
Which of the molecules in the diagram can combine to form ammonia?
- A1 and 3
- B1 and 2
- C1, 2, and 3
- D2 and 3
Q5:
The diagram shows the structure of four different chemicals: a noble gas, a salt made from a metal and a nonmetal, a metal, and a covalent compound.
Which chemical is the covalent compound?
- AChemical Q
- BChemical S
- CChemical R
- DChemical P
Q6:
Although there are some rare exceptions, the number of atoms of an element in a covalent compound depends on the number of bonds that need to be formed to create full outer shells in all the atoms.
The electronic structures of two elements are shown in the diagram.
What is the likely chemical formula of the covalent molecule formed between A and B?
- A
- B
- C
- D
- E
Q7:
What type of covalent bond is indicated by the 4 electrons, shown in green, in the center of the molecule?
- AA single covalent bond
- BA double covalent bond
- CA triple covalent bond
Q8:
Which of the following diagrams shows the correct bonding in a molecule of nitrogen gas ()?
- A
- B
- C
- D
- E
Q9:
The diagram shows a molecule of hydrogen chloride gas. Which statement correctly describes how a single covalent bond is formed between the two atoms?
- AThe atoms share a pair of electrons, and both atoms gain a full outer shell.
- BThe hydrogen atom transfers an electron to the chlorine atom, and both atoms gain a full outer shell.
- CThe atoms share a pair of electrons, and only the chlorine atom gains a full outer shell.
- DThe hydrogen atom transfers an electron to the chlorine atom, and both atoms have the same number of electrons in their outer shell.
- EThe atoms share a pair of electrons, and both atoms have the same number of electrons in their outer shell.
Q10:
Chlorine molecules consist of 2 chlorine atoms connected by a single covalent bond. Use your knowledge of how a covalent bond is formed to select the diagram that shows a covalent bond formed by the correct electrons from the correct atom.
- A
- B
- C
- D
- E
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