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# why does atomic radius decrease across a period

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1.why does atomic radius decrease across a period

Oct 20, 2015. Atomic radius decreases across a period because valence electrons are being added to the same energy level at the same time the nucleus is increasing in protons. The increase in nuclear charge attracts the electrons more strongly, pulling them closer to the nucleus.

2.why does atomic radius decrease across a period

Atomic radius decreases across a period because electrons are being added to the same energy level and at the same time the nucleus is increasing in protons. The increase in nuclear charge \$\$Z_{eff}\$\$ attracts the electrons more strongly, (addition of one proton has a greater effect than addition of 1 electron) thus pulling electron closer to the nucleus and making atomic radius decrease.

3.why does atomic radius decrease across a period

and the atomic radius decreases. You might expect the atomic radius to increase because the number of electrons in each atom increases going across period 3. However, this does not happen: the number of protons also increases and there is relatively little extra shielding from electrons in the same shell.

4.why does atomic radius decrease across a period

Atomic radius decreases across a period because valence electrons are being added to the same energy level at the same time the nucleus is increasing in protons. The increase in nuclear charge attracts the electrons more strongly, pulling them closer to the nucleus.

5.why does atomic radius decrease across a period

The nuclear charge of the atom increases across a period because there are more protons concentrated in the nucleus of the atom. This means electrons are attracted more strongly to the nucleus and move closer to it; when they’re closer, the radius naturally gets smaller. 0

6.why does atomic radius decrease across a period

Nuclear charge increases across the period, therefore the attraction between the positively charged nucleus and negatively charged electrons increases, so the atomic radii decreases. The number of electrons also increases across a period, but as each extra electron enters the same principal energy level, there is relatively little extra shielding.

7.why does atomic radius decrease across a period

Atomic radius will increase down a group as the number of shells (or energy levels) increases. Atomic radius will decrease across a period (from left to right) as the effective nuclear charge…

8.why does atomic radius decrease across a period

So WHY does atomic radii decrease as you move left to right across a period? This is because the addition of one proton (synonymous to saying, left to right on periodic table) to an atom gives a…

9.why does atomic radius decrease across a period

The first atomic radius periodic trend is that atomic size decreases as you move left to right across a period. Within a period of elements, each new electron is added to the same shell. When an electron is added, a new proton is also added to the nucleus, which gives the nucleus a stronger positive charge and a greater nuclear attraction.

10.why does atomic radius decrease across a period

As you move down a column or group, the ionic radius increases. This is because each row adds a new electron shell. Ionic radius decreases moving from left to right across a row or period. More protons are added, but the outer valence shell remains the same, so the positively charged nucleus draws in the electrons more tightly.

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### BING based on video search results

 1  Q17 Why atomic radii of elements increase down the group and decrease across a period? Presented by www.shikshaabhiyan.com This video is a part of the series for CBSE Class 10, Chemistry demo videos for chapter “Periodic Classification of Elements.” In this series, we have completed all the concepts, examples and the entire NCERT exercises. It is the part of an initiative taken by www.shikshaabhiyan.com to provide quality … Watch Video: https://www.youtube.com/watch?v=SQoJPGSR2Sg

### Wikipedia based search results

The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the…

2.Metallic bonding

quoted above. The radii follow general periodic trends: they decrease across the period due to increase in the effective nuclear charge, which is not…

3.Periodic table

the nucleus. This decrease in atomic radius also causes the ionization energy to increase when moving from left to right across a period. The more tightly…