What is the relationship between atomic radius and ... - Socratic
2017年9月11日 · Atomic radius is the measure of the size of an atom. (An estimate of the radius, or distance, between the nucleus and the electron on the furthest occupied shell. As for the atom structure, the positive nucleus is in the center, and the negatively charged electrons are around, so the only force (relatively) acting on the electron that will ...
How do you find atomic radius given the density? - Socratic
2016年6月1日 · Here's one way to do it. > For a metal, you need the density, the molar mass, and the crystal structure. Let's calculate the atomic radius of polonium, which has molar mass = 209 g/mol, density = "9.32 g/cm"^3, and exists in a simple cubic unit cell. We see that there is 1 atom per unit cell (1/8 "atom" at each corner) and that the edge length of the cell (a) is twice the …
Why does atomic radius decrease as you go across a period?
2015年10月20日 · Nuclear charge dominates whilst adding electrons to the same shell. The net result is atomic contraction across a period. This is a very important periodic phenomenon: the contraction of atomic radii across the period. While as we add to Z (the number of protons in the nucleus), we also add another electron (and charge is therefore kept neutral), the increased …
What is atomic radius? - Socratic
2018年4月14日 · The radius of an atom. It is defined as the distance between the center of the atom's nucleus and its valence electrons. Atomic radius is the distance from an atom's nucleus to one of its valence electrons. Every atom has a difference atomic radius. There are certain trends for atomic radii. When we go down a group, more electrons are present in the atom, so more …
Periodic Trends in Atomic Size - Chemistry - Socratic
2018年3月15日 · Periodic trends predict differences between elemental characteristics as you move across the periodic table. Trends are based on Coulomb's law which mathematically relates several characteristics of an elements. Atomic size measured the distance between the nucleus of an atom and the outermost non-valence electrons of the atom. Atomic size decreases from left …
What is the trend in atomic radius from left to right on the
2015年12月23日 · Atomic size decreases from left to right in the Periodic Table. > 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. At the same time, electrons are added to the atoms as you move from left to right across a period. These electrons reside in the same energy shell and …
How does atomic size affect reactivity? - Socratic
2014年12月6日 · The larger an atom is, the more reactive it will be. It helps to think about the size of an atom with the location of the electrons and nucleus in mind. You know that protons are positively charged and electrons are negatively charged, therefore there is a level of attraction between these two oppositely charged subatomic particles. This attraction helps stabilize the …
What element has the smallest atomic radius? - Socratic
2016年10月29日 · Atomic size decreases across a Period, but INCREASES down a Group. And thus the element with the smallest atomic radius should be "helium, Z=2". This site reports that the atomic radius is 31xx10^-12m, where the atomic radius of the hydrogen atom is 53xx10^-12m. That atomic size should decrease across a Period from left to right as we face the Table, can …
What is the trend in atomic radius as you go across a period?
2015年12月4日 · Atomic radius decreases across a Period, but increases down a Group. So why? Going across the Period, you add protons, positive particles, to the nucleus, whilst electrons are added to the same shell. Nuclear charge wins, and the electrons are pulled closer to the nucleus. Going down a Group, there are inner shells of electrons that shield the increasing nuclear …
Why does Magnesium have a smaller atomic radius than Lithium?
2021年7月31日 · Atomic radius is not solely dependent on the amount of electron shells an atom has, it is more dependent on the amount of electrons and the attraction between these and the nucleus. Lithium has a greater atomic radius as it's outer valence shell, having only one electron, is not as strongly attracted.