A group of students is studying chemical bonds. They learned that electrons are shared between covalent bonds and transferred from one atom to another to form ionic bonds. They investigate the types of chemical bonds in five samples. During the first investigation, they test how long it takes for each sample to melt. During the second investigation, they test each the conductivity of each sample by connecting it to a circuit. The results of each test are recorded in the data table.

Question

A group of students is studying chemical bonds. They learned that electrons are shared between covalent bonds and transferred from one atom to another to form ionic bonds. They investigate the types of chemical bonds in five samples. During the first investigation, they test how long it takes for each sample to melt. During the second investigation, they test each the conductivity of each sample by connecting it to a circuit. The results of each test are recorded in the data table.

Samples Melting Test Light Bulb Test
1 Did not melt The light bulb lit up
2 Melted quickly The light bulb remained off
3 Melted, but not very quickly The light bulb remained off
4 Did not melt The light bulb lit up
5 Did not melt The light bulb lit up but dimly

Based on the observations of the melting test, which samples are MOST LIKELY covalent bonds?

A.
Sample 1 and Sample 5

B.
Sample 2 and Sample 5

C.
Sample 2 and Sample 3

D.
Sample 3 and Sample 4

Answer 1

The samples that are most likely covalent bonds are Sample 2 and Sample 3. This is because they both melted during the test, but not quickly. Covalent bonds typically have lower melting points compared to ionic bonds, which is why these samples melted.