What increases atomic radius?
Atomic radius decreases from left to right within a period. This is caused by the increase in the number of protons and electrons across a period. Atomic radius increases from top to bottom within a group. This is caused by electron shielding.
Which element is most likely to attract electrons?
Electronegativity increases from bottom to top in groups, and increases from left to right across periods. Thus, fluorine is the most electronegative element, while francium is one of the least electronegative.
Which has the highest tendency to attract electrons?
fluorine
Which element has the strongest tendency to attract electrons?
chlorine
What is the trend in EA across a period?
There are general trends in electron affinity across and down the periodic table of elements. Electron affinity generally increases across a period in the periodic table and sometimes decreases down a group.
What causes atoms to attract?
Oppositely charged particles attract each other, while like particles repel one another. Electrons are kept in the orbit around the nucleus by the electromagnetic force, because the nucleus in the center of the atom is positively charged and attracts the negatively charged electrons.
What happens when atoms are pushed together?
Covalent bonds If two atoms get close enough together then the electrons of each atom will be attracted to both nuclii. If the atoms get two close then the nuclii will repell each other.
Why do electrons repel each other?
When you have two electrons, the combined electric fields result in a higher and higher potential energy as they get closer. In order to minimize the potential energy, they repel each other (in the case of a positive and negative charge, potential energy is minimized by bringing them together, so they attract).
Why do same charge repel each other?
The two charges repel each other. If a positive charge and a negative charge interact, their forces act in the same direction, from the positive to the negative charge. As a result opposite charges attract each other: The electric field and resulting forces produced by two electrical charges of opposite polarity.
How do electrons interact with each other?
Energy from photons or light particles can be absorbed or released by electrons. When an electron absorbs a photon, the energy can free the electron to move around, or the electron can release the energy as another photon.
What will an electron and a proton do if located near each other?
Project the animation Protons and Electrons. Explain to students that two protons repel each other and that two electrons repel each other. But a proton and an electron attract each other. Another way of saying this is that the same or “like” charges repel one another and opposite charges attract one another.
What happens when light interacts with electrons?
electrons and energy. When an electron is hit by a photon of light, it absorbs the quanta of energy the photon was carrying and moves to a higher energy state. One way of thinking about this higher energy state is to imagine that the electron is now moving faster, (it has just been “hit” by a rapidly moving photon).
Do photons eject electrons?
Individual photons interact with individual electrons. Thus if the photon energy is too small to break an electron away, no electrons will be ejected. If EM radiation was a simple wave, sufficient energy could be obtained by increasing the intensity.
How do photons eject electrons?
The explanation in terms of light being made up of photons: To eject one electron from the metal takes one photon. Electrons are bound to the metal by a binding energy we call the work function, Wo, which differs from metal to metal. If the photon energy is less than the work function, no electrons are emitted.
Is a photon smaller than an electron?
That’s certainly small but not smaller then a photons which don’t have any mass, charge and radius. the size of photons and electrons are same as mass,but electron is negatively charged particle and photon is the energy (quanta).
Why do electrons release photons?
When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.
Why can’t an electron absorb a photon?
A free electron cannot absorb a photon as it is not possible to satisfy the energy and momentum conservation simultaneously. In Compton effect we have both electron and a photon as the final product and it is then possible to conserved energy and momentum.
How many photons can an electron absorb?
The atom absorbs or emits light in discrete packets called photons, and each photon has a definite energy. Only a photon with an energy of exactly 10.2 eV can be absorbed or emitted when the electron jumps between the n = 1 and n = 2 energy levels….Energy Levels of Electrons.
| Energy Level | Energy |
|---|---|
| 3 | -1.51 eV |
| 4 | -.85 eV |
| 5 | -.54 eV |
Can photons be created?
6. Photons are easily created and destroyed. Unlike matter, all sorts of things can make or destroy photons. If you’re reading this on a computer screen, the backlight is making photons that travel to your eye, where they are absorbed—and destroyed.
Can photons combine?
Since light itself does not have electric charge, one photon cannot directly interact with another photon. Instead, they just pass right through each other without being affected. A photon can spontaneously degenerate into a particle with mass and its antiparticle in a process known as pair production.