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How do the radii of atoms change across a period of the periodic table?
Wiki User
∙ 10y ago
More protons in the nucleus pull the electrons in, making the atomic radius smaller.
Dahlia Miller
Wiki User
∙ 14y agoAtomic radius decreases as one moves from left to right across a period. As one moves across a period in this manner, one more electron and one more proton are each added to the atom. However, the electrons are all in the same or similar energy levels. Because of this, they do not shield the positive charge of the extra proton well from the other valance electrons and they all experience a greater charge, causing them to be pulled closer to the nucleus, thereby reducing the atomic radius.
Wiki User
∙ 12y agoAtomic radius is half of the distance between the centers of two of the same element that are bonded together. From left to right in a group atomic radius decreases and down a group it increases.
Wiki User
∙ 11y agoAtomic radius tends to increase as one proceeds down any group of the Periodic Table. This trend is intuitively satisfying: atoms with more electrons have larger radii. As one proceeds across any row of the periodic table, a more complex rationale is required: atoms contract in size within a period from left to right. This contraction results from the increasing number of protons in the nucleus. Protons make little contribution to the size of the atom, but they increase the positive charge of the nucleus, which draws the electrons into tighter orbitals.
Wiki User
∙ 10y agoAs we go left to right in a period, the nuclear charge becomes stronger and stronger, and the electrons get added in the same shell, so there is no appreciable inter-electronic repulsion. Thus, the size decreases due to more attraction.
Wiki User
∙ 13y agowhile the atomic no increases the electrons in the attom increases and no of shells increases .so the size of the attom increases
Wiki User
∙ 11y agoDecreases across a period as the effective nuclear charge increases. Increases down a group as the energy level (shells) increases.
Wiki User
∙ 9y agoAtomic radius decreases across a period.This is because nuclear charge increases.
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Why don't atoms simply get larger as you read across the periodic table?
because the no. of shells in the atoms across the periodic table remains the same
Is it true Moving across a row of the periodic table the atoms tend to get bigger?
yes
Nuclear charge increases across a period atoms become?
The atoms become smaller in atomic radius.
How does the atomic mass size change as you move down the periodic table?
Atoms increase in size as you go down a column and are larger going from right to left across a row.because while going from left to right in a period electrons enter in the same orbit and hence the attraction between the nucleus increases ,,
Why as you grow across the periodic table atoms go smaller and grows bigger down the chart?
Because they do just get over it!
Why don't atoms simply get larger you read across the periodic table?
because the no. of shells in the atoms across the Periodic Table remains the same
Why don't atoms simply get larger as you read across the periodic table?
because the no. of shells in the atoms across the periodic table remains the same
Why do the properties of elements change across the period?
They change because the atomic number and mass differ from each other element. Going across the Periodic Table to the right, the atoms get smaller because another proton is added each time so the effective nuclear charge experienced by the electrons is greater and the electrons are pulled closer to the nucleus. Electronegativity increases as you progress across a period because smaller atoms are usually more likely to gain an electron. Ionization energy increases across a period because the atoms are smaller, pulled closer to the nucleus, so it takes more energy to break an electron away.
What is a row of elements across the periodic table called?
The rows going across the periodic table are called periods. As you go across a row, each element increases in number of protons and electrons, which distinguishes it from other elements in the table.
How the period in the periodic table?
The no of period of Periodic Table tells the no of shells in atoms, so their atomic sizes and other physical properties may be imagined.
Why do numbers of electrons change across a period of elements?
Why not?If two atoms have the same number of protons, they're the same element. Therefore, unless they're electrically charged, they must have the same number of electrons as well. So the number of electrons in two different elements must be different if the atoms are electrically neutral.
Is it true Moving across a row of the periodic table the atoms tend to get bigger?
yes
Nuclear charge increases across a period atoms become?
The atoms become smaller in atomic radius.
How does the atomic mass size change as you move down the periodic table?
Atoms increase in size as you go down a column and are larger going from right to left across a row.because while going from left to right in a period electrons enter in the same orbit and hence the attraction between the nucleus increases ,,
Why as you grow across the periodic table atoms go smaller and grows bigger down the chart?
Because they do just get over it!
Which atom is the smallest among lithium and fluorine?
Fluorine because it has a smaller atomic radius.
How is the number of energy levels in an atom related to the periodic number?
The period number is the same as the highest energy level containing electrons for the atoms in that period.
