Periodic Trends Practice

Front

What is atomic mass?

Back

Atomic mass is the weighted average mass of an atom's isotopes, measured in atomic mass units (amu). It reflects the number of protons and neutrons in the nucleus.

Front

Which element has the largest atomic mass among Ga, Al, and Si?

Back

Gallium (Ga) has the largest atomic mass.

Front

What is the trend in atomic radius as you move across a period from left to right?

Back

The atomic radius decreases as you move from left to right across a period due to increased nuclear charge attracting electrons more strongly.

Front

What happens to atomic radius as you move down a group in the periodic table?

Back

The atomic radius increases as you move down a group because additional energy levels (shells) are added.

Front

Define ionization energy.

Back

Ionization energy is the energy required to remove an electron from an atom in its gaseous state.

Front

Which has a higher ionization energy: Neon (Ne) or Arsenic (As)?

Back

Neon (Ne) has a higher ionization energy than Arsenic (As).

Front

What is the relationship between atomic radius and ionization energy?

Back

Generally, as atomic radius increases, ionization energy decreases because the outer electrons are further from the nucleus and experience less attraction.

Front

What is the effect of increasing protons on atomic radius?

Back

Increasing the number of protons in the nucleus pulls electrons closer, resulting in a smaller atomic radius.

Front

What is the order of increasing radius for F^-1, Kr, K⁺¹, N^-3?

Back

The order of increasing radius is K⁺¹, Kr, F^-1, N^-3.

Front

Explain why K⁺¹ is smaller than K.

Back

K⁺¹ is smaller than K because it has lost an electron, resulting in less electron-electron repulsion and a stronger pull from the nucleus.