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Why do atoms get smaller when more electrons are added?
Adding more electrons to an atom results in increased electron-electron repulsion, which causes the electrons to be pulled closer to the nucleus to minimize this repulsion. As a result, the atomic radius decreases as more electrons are added.
Why atomic radius remains almost unchanged as you move through period 2 from group 14 to 18?
Electrons are all being added to the same "p" sublevel so no new energy levels are being added. Actually as you go across the size will decrease slightly due to the increase in the charge of the nucleus.
What alkali metal has an atomic radius of 238 pm?
The alkali metal with an atomic radius of 238 pm is potassium (K). Its large atomic radius is due to the added electron shells compared to other alkali metals in the same period.
How does atomic radius vary down a group?
Atomic radius increases down a group on the periodic table because with each additional period an energy level is added.
What can be added or taken away from an atom to change the atomic mass?
The atomic mass of an atom can be changed by adding or removing subatomic particles. By adding or removing protons, neutrons, or electrons, the atomic mass will be altered. Changing the number of protons will change the element, while changing the number of neutrons will create isotopes of the same element.
What happens to the atomic radius as the atomic number increases?
Going across a row in the peiodic table, the atoms have more protons and electrons causing a stronger attractive force, pulling the electrons closer to the nucleus, making the atomic radius decrease. As a new shell is added ( next row down) the atomic radius increases
How does the atomic radius change from the left to the right horizontal row in the periodic table?
The atomic radius decreases from left to right across a period in the periodic table. This is due to the increasing number of protons in the nucleus, which pulls the electrons closer to the nucleus, resulting in a smaller atomic radius.
What makes the atomic radius change along a period in the periodic table?
More protons in the nucleus pull the electrons in, making the atomic radius smaller.
How does the atomic radius change from left to right in Groups 1 and 2?
The atomic radius increases from top to bottom in groups 1 and 2 of the modern periodic table. This happens because the number of energy shells increase and are occupied by the increasing number of electrons. As the subsequent shells are completed they are located further from the nucleus due to the decreasing force of attraction between nucleus and the electrons. This leads to an increase in atomic radius. == == Atomic radius is a result of the completion of orbitals as atoms get heavier by adding neutrons and protons to the nucleus. The larger nucleus can hold more electrons. The cloud of electrons determines the atomic radius. Each completed orbital (S,P,D or F) takes up room. The higher orbitals have a greater radius . Unlike the old Bohr theory of atoms (little electrons in orbits around the nucleus), the new probability distribution interpretation of the electrons leads to spherical or hourglass shaped volumes.
Within a period what happens to the atomic radius you go down the column?
The atomic radius generally increases as you move down a column in the periodic table. This is because each successive element has an additional energy level, leading to larger orbits for the electrons and an overall increase in atomic size.
What is the trend in atomic radius down a group explain?
The trend in atomic radius increases down a group. This is because as you move down a group, each element has an additional energy level of electrons, leading to a larger atomic radius. The increased number of electron shells results in greater electron-electron repulsion, causing the outermost electrons to be pushed farther away from the nucleus, thus increasing the atomic radius.
Does atomic radius increase left to right in the periodic table of elements?
Generally it decreases. There are a few exceptions: the noble gases tend to be quite a bit bigger than the corresponding halogens, and there's a smaller bump as you go from d-block elements to p-block elements.
Why do atoms get smaller when more electrons are added?
Adding more electrons to an atom results in increased electron-electron repulsion, which causes the electrons to be pulled closer to the nucleus to minimize this repulsion. As a result, the atomic radius decreases as more electrons are added.
In general the atomic radius of an atom as you move down a column in the periodic table?
Decreases. Look at the images under atomic radius, on wikipedia.
Does the atomic radius decrease as you move up a group and across a period from left to right on the periodic table?
the atomic radius decreses from left to right in periodic table due to increase in the number of succesive element the electrons of the outermost shell are more attracted towards nucleus and the atomic radius or atomic size decreases.
How does the atomic radius change down a group in the periodic table?
because new shell are being added as we move down the group and the electron is being far away from the nucleus so the attraction bettween the nucleus and the electron is smaller It means that their is a less use of ionisation energy . Therefore, atomic radius increase down the group.
What physical trends for atomic number versus covalent radius?
As the atomic number increases within a period (row) on the periodic table, the covalent radius generally decreases due to increasing nuclear charge pulling the electrons closer to the nucleus. Within a group (column), as the atomic number increases, the covalent radius tends to increase since new electron shells are being added, leading to a larger atomic size.
