Which response presents ions in order of increasing atomic radius?
a) smallest Cl-, K+, Na+ largest
b) smallest Cl-, Na+, K+ largest
c) smallest K+, Na+, Cl- largest
d) smallest Na+, K+, Cl- largest
I would assume the answer would be D since the electrons are more tightly bounded to the nucleus than they would with Cl-.
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What should be the correct order (largest to smallest) of hierarchy for Classification of Organisms?
class → order → family → genus → species
order → class → family → genus → species
species → genus → order → family → class
The correct order (largest to smallest) of hierarchy for Classification of Organisms is:
Kingdom → Phylum → Class → Order → Family → Genus → Species
Note: The modern classification system includes two additional levels (Domain and Kingdom) above Kingdom.
To determine the order of ions based on increasing atomic radius, you need to consider the position of the ions in the periodic table. The atomic radius generally increases as you move down a group and decreases as you move across a period.
Let's analyze each option:
a) smallest Cl-, K+, Na+ largest
In this option, Cl- is the largest and K+ is the smallest. However, Na+ is larger than K+. Thus, this option is not correct.
b) smallest Cl-, Na+, K+ largest
According to this option, Cl- is the smallest and K+ is the largest. This is consistent with the general trend. Thus, this option is a possibility.
c) smallest K+, Na+, Cl- largest
In this option, K+ is the smallest and Cl- is the largest, which is not consistent with the trend. Therefore, this option is not correct.
d) smallest Na+, K+, Cl- largest
According to this option, Na+ is the smallest and Cl- is the largest. This is not in line with the general trend, as Na+ should be larger than K+. Therefore, this option is not correct either.
Based on the analysis, option b) is the correct answer. The correct order of ions in terms of increasing atomic radius is smallest Cl-, Na+, K+ largest.