Q. What happens to the atomic radius as you go from left to right across a periodic table and what happens as you move from the top down?
As you move from left to right, the nucleus gains protons. This increases the positive charge of the nucleus and its attractive force on the electrons. As a result, the valence electrons are held closer to the nucleus, and the atomic radius decreases.
Q. How does the atomic radius change as you go first from left to right in a period?
(a) (i) Atomic radius decreases from left to right in a period because effective nuclear charge increases from left to right in a period. Due to this effective nuclear charge, the electronegativity increases and the attraction of nucleus on valence shell electrons also increases. So the size decreases.
Q. Which of the following has smallest radius 1s2?
Which of these elements is the smallest atom and which has the highest ionization energy? Chlorine has the smallest atomic radius and the highest ionization energy. 3.
Q. Which one of the following atoms n p/s o has the largest atomic radius?
So Cesium has the largest atomic radius among the given elements.
Q. How do you know which ion has the largest radius?
The ionic radii of cations follow the same trends as atomic radii. They increase from top to bottom and from right to left in the Periodic Table. Thus, the ion with the largest radius is closest to the lower left corner of the Periodic Table, and that is the K+ ion.
Q. Is K+ smaller than Li+?
The radii of the ions as well as their diffusion coefficients obtained from the literature are shown in Table 2 [32,33]. It can be seen that the ionic radius of Li+ is almost half of K+, while that of Cs+ is approximately 30% higher.
Q. Which is smaller ion K+ or Li+?
a) : The atomic number of ‘K’ and ‘Li’ is 19 and 3. In case of and , the ions has 18 and 2 electrons respectively. As the number of electrons is less in it is smaller in size.
Q. Why Mg2+ is smaller than Li+?
Obviously Magnesium Mg2+ will have higher force of attraction than Li+. So the ionic radii of the two varies due to the force of attraction. So Mg2+ tends to have smaller ionic radii compared to Li+ due to higher force of attraction.
Q. Which is smaller K+ or Na+?
K+ has a larger atomic radius than Na+. The Periodic Table is accompanied by many trends. One such trend involves the atomic radius for these elements. As you go down the periodic table, the atomic radius increases which is why K+ has a larger radius… it’s below Na+.
Q. Why K+ is larger than Na+?
K+ is larger than Na+ because the ionic radius increases in a particular group on moving from top to bottom due to increase in the principle energy shell though the number or electrons in the valence shell remain the same.
Q. Which is bigger Na or K+?
As an example, potassium (K) has a larger average atomic radius (220 pm)than sodium (Na) does (180 pm). The potassium atom has an extra electron shell compared to the sodium atom, which means its valence electrons are further from the nucleus, giving potassium a larger atomic radius.
