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In a period, the number of shells of all the elements is same. So, this basically means that all must have the same radius or same size. but, this is not the case because, as we move across a period, one electron gets added. So, as the negative charge of the atom keeps increasing or as the atomic number keeps increasing, the number of positively charged protons also keeps increasing. This means, there is more nuclear force of attraction between the nucleus ( where protons are present) and electrons of the atom. Thus, this nuclear force causes the nucleus to hold on to the electrons more tightly ,i.e, the electrons get closer to the nucleus which means the shells which contain the electrons are pulled closer. This means, the atom's radius keeps decreasing. Thus, across a period, the atomic size decreases due to the increasing nuclear force of attraction.
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What is is the trend across a period?
The trend across a period refers to how a property of elements changes as you move from left to right across a row in the periodic table. For example, in terms of atomic size, the trend across a period is generally a decrease due to the increasing number of protons in the nucleus pulling the electrons closer.
What trends in size are found among elements in the same period?
The atomic radius decrease from left to right.
Does elements on the periodic table decrease in atomic size when you move across a period from left to right and when you move down a group?
Atomic size generally decreases as you move across a period from left to right due to increasing effective nuclear charge. However, atomic size tends to increase as you move down a group due to the addition of more electron shells.
How are the size of the elements effected on the periodic table?
Atomic size increase down the group and decreases across the period.
Why does the size of d-block elements decrease gradually in the periodic table?
The size of d-block elements gradually decreases across a period due to increasing effective nuclear charge, which attracts the valence electrons more strongly, leading to a smaller atomic radius. Additionally, there is poor shielding of the nuclear charge by inner shell electrons in these elements, contributing to the decrease in size.
How do the metallic properties of the elements change as you move from left to right on the periodic table?
Metallic character decreases as we move across a period. The electronegative character increases as we move across a period. So the element across the period will be non mettalic in nature.
Which characteristics both generally decrease When the elements in period 3 on the periodic table are considered it order from left to right?
As you move from left to right across period 3 on the periodic table, the atomic radius, metallic character, and reactivity generally decrease. This is because the increasing number of protons in the nucleus leads to stronger attraction for the electrons, resulting in a smaller atomic size and less metallic behavior.
What is the trend in the electronegative of the elements from-left to right and from top to bottom?
Electronegativity generally increases from left to right across a period and decreases from top to bottom down a group. This is because as you move across a period, the nuclear charge increases, attracting electrons more strongly. Down a group, the atomic size increases which leads to a decrease in electronegativity.
Why does atomic size increase from left to right across a period?
atomic size decreases across a period
Does an element on the periodic table decrease in atomic size when you move across a period from left to right and when you move down a group?
1. In a period is a trend of decrease from left to right but it is not absolute.2. In a group the atomic radius increase moving down.
Does the electronegativity of the elements on the right side of the same period tend to be higher?
Yes, generally the electronegativity of elements increases as you move from left to right across a period on the periodic table. This trend is due to the increased nuclear charge and decreased atomic size as you move across the period, which results in stronger attraction for electrons.
When you go across the periodic table how does the atomic size go?
Atomic size tends to decrease as you move from left to right across a period on the periodic table. This is due to increasing effective nuclear charge, which attracts the electrons more strongly and pulls them closer to the nucleus.
