The graph shows the heating curve for a pure substance. The temperature rises with time as the substance is heated.
What is the physical state(s) of a substance at point B?
Important Questions on The Nature of Matter
The graph shows the heating curve for a pure substance. The temperature rises with time as the substance is heated.
What is the physical state(s) of a substance at point A?
The graph shows the heating curve for a pure substance. The temperature rises with time as the substance is heated.
What is the physical state(s) of a substance at point B?
What is the melting point of the substance?
(A) (B) (C)
Enter your correct answer as A, B or C.
The graph shows the heating curve for a pure substance. The temperature rises with time as the substance is heated.
What is its boiling point?
(A) (B) (C)
Enter your correct answer as A, B or C.
Use the data given for the substances listed below to answer the question that follows on its physical state at its room temperature of and atmospheric pressure.
| Substance | Melting point/ | Boiling point/ |
| sodium | 98 | 883 |
| radon | -71 | -62 |
| ethanol | -117 | 78 |
| cobalt | 1492 | 2900 |
| nitrogen | -210 | -196 |
| propane | -188 | -42 |
| ethanoic acid | 16 | 118 |
Which substance is a liquid over the smallest range of temperature?
and atmospheric pressure.
| Substance | Melting point/°C | Boiling point/°C |
| sodium | 98 | 883 |
| radon | –71 | –62 |
| ethanol | –117 | 78 |
| cobalt | 1492 | 2900 |
| nitrogen | –210 | –196 |
| propane | –188 | –42 |
| ethanoic acid | 16 | 118 |
This part of the exercise is concerned with electron arrangements and the structure of the Periodic Table. Complete these sentences by filling in the blanks with words or numbers.
The second shell fills next from lithium to _____.
This part of the exercise is concerned with electron arrangements and the structure of the Periodic Table. Complete these sentences by filling in the blanks with words or numbers.
The fourth shell start to fill from potassium to _____.
