What is gallium used for?
What is gallium used for?
Gallium is a soft, silvery metal used primarily in electronic circuits, semiconductors and light-emitting diodes (LEDs). It is also useful in high-temperature thermometers, barometers, pharmaceuticals and nuclear medicine tests.
How many electrons are in Oxygen’s valence shell?
six valence electrons
What is the highest energy level?
Number of electrons per sublevel
| Energy Level | Sublevels | Maximum Number of Electrons per Energy Level |
|---|---|---|
| 1 | s | 2 |
| 2 | s | 8 |
| p | ||
| 3 | s | 18 |
Which Shell has more energy K or L?
L shell has higher energy because according to Bohr’s theory the shell which is closer to nucleus has lower energy and the shell which is away from the nucleus has higher energy. K is closer to nucleus. So it has lower energy than L-shell.
Where do electrons have the most energy?
Electrons at higher energy levels, which are farther from the nucleus, have more energy. They also have more orbitals and greater possible numbers of electrons. Electrons at the outermost energy level of an atom are called valence electrons.
What are the 2 types of electrons?
While electrons are indistinguishable from each other, there are “extra electron-like” particles in the Standard Model of elementary particles. Alongside the electron are two other particles, called the muon and tau particles (these three are usually called leptons).
Which electrons have less energy?
Electron Shells Electrons that are in the first energy level (energy level 1) are closest to the nucleus and will have the lowest energy.
What’s the smallest thing in the universe?
Electrons
Is infinitely small possible?
Physics has a problem with small things. Or, to be more precise, with infinitely small things. We imagine that we can move any distance we like, no matter how small. When we try to describe something as a “point” – an infinitely small object, that throws up some of the most intractable problems in physics.
What is the biggest thing ever?
The biggest supercluster known in the universe is the Hercules-Corona Borealis Great Wall. It was first reported in 2013 and has been studied several times. It’s so big that light takes about 10 billion years to move across the structure. For perspective, the universe is only 13.8 billion years old.
What is the most beautiful thing in the universe?
A: “The most beautiful thing in the universe is the human ability to comprehend it. “Our universe is extraordinarily complex, with processes occurring on all scales, from the subatomic world to the universe at large.
Who is the biggest star in the universe?
Answer: The largest known star (in terms of mass and brightness) is called the Pistol Star. It is believed to be 100 times as massive as our Sun, and times as bright! In 1990, a star named the Pistol Star was known to lie at the center of the Pistol Nebula in the Milky Way Galaxy.
Which is biggest sun or star?
On a stellar scale, it’s really quite average — about half of the known stars are larger; half are smaller. The largest known star in the universe is UY Scuti, a hypergiant with a radius around 1,700 times larger than the sun.
What is the hottest star color?
Blue stars
Which star is coldest?
The star has been named WISE J085510. 5. The dwarf star has a chilly temperature between minus minus 48 to minus 13 degrees Celsius. Previous record holders for coldest brown dwarfs were also found by WISE and Spitzer and were about room temperature.