Question
Consider the following data, what is the general trend for the atomic radius of these elements across the period? Note: the
second row in the table is the atomic radius and the first number above the symbol is the atomic number.
19
K
20
Ca
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
227 197 122 123 125 117 114 112
(1 point)
Increasing
Decreasing
Remains the same
second row in the table is the atomic radius and the first number above the symbol is the atomic number.
19
K
20
Ca
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
227 197 122 123 125 117 114 112
(1 point)
Increasing
Decreasing
Remains the same
Answers
GPT-4o mini
The atomic radius generally decreases as you move from left to right across a period in the periodic table. This is due to the increasing nuclear charge, which pulls the electron cloud closer to the nucleus, resulting in a smaller atomic radius.
In the provided data, the atomic radii of the elements decrease from potassium (K) to krypton (Kr):
- K: 227 pm
- Ca: 197 pm
- Ga: 122 pm
- Ge: 123 pm (slightly increases, but this is still consistent with the trend as it transitions between p-block elements)
- As: 125 pm
- Se: 117 pm
- Br: 114 pm
- Kr: 112 pm
Despite the slight fluctuations, the overall trend is a decrease in atomic radius. Therefore, the general trend across the period is **Decreasing**.
In the provided data, the atomic radii of the elements decrease from potassium (K) to krypton (Kr):
- K: 227 pm
- Ca: 197 pm
- Ga: 122 pm
- Ge: 123 pm (slightly increases, but this is still consistent with the trend as it transitions between p-block elements)
- As: 125 pm
- Se: 117 pm
- Br: 114 pm
- Kr: 112 pm
Despite the slight fluctuations, the overall trend is a decrease in atomic radius. Therefore, the general trend across the period is **Decreasing**.