2024 Semester 1 Chemistry Exam

Front

What does the atomic number represent?

Back

The atomic number represents the number of protons in the nucleus of an atom, which determines the element's identity.

Front

Which element has the largest atomic radius in period 3?

Back

Sodium (Na) has the largest atomic radius in period 3.

Front

What are metalloids?

Back

Metalloids are elements that have properties of both metals and non-metals.

Front

What is a characteristic property of metalloids?

Back

A characteristic property of metalloids is their brittle nature.

Front

What is nuclear fusion?

Back

Nuclear fusion is the process where two light atomic nuclei combine to form a heavier nucleus, releasing energy.

Front

What is nuclear fission?

Back

Nuclear fission is the splitting of a heavy atomic nucleus into smaller nuclei, accompanied by the release of energy.

Front

What is the difference between fission and fusion?

Back

Fission involves splitting a heavy nucleus, while fusion involves combining light nuclei.

Front

What is atomic mass?

Back

Atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What are the main groups of the periodic table?

Back

The main groups include alkali metals, alkaline earth metals, transition metals, halogens, and noble gases.