<h2>C
omets are made of Chunks of rock, gas, Ice, and dust. The Answer is A and C.</h2>
Explanation:
Comets is one of the main types of space rocks. Recent researchers has termed Comets as 'dirty snowballs' of space, that contains ice, rock, gas and dust. The solid center of the comet is less than 10 kilometers across.
Comets are believed to have originated beyond Neptune and Pluto. It is called the Oort Cloud that surrounds the solar system.
It carries carbon dioxide, methane, ammonia, and many more gases. According to Astronomers, comets are assumed to be the leftovers of the material that was initially the part of solar system about billion years ago.
Answer:
An electron orbital describes a three-dimensional space where an electron can be found 90% of the time.
Explanation:
According to Heisenberg's theory we cannot observe the position and velocity of an electron in an orbit, but if they were around the nucleus (in orbit), it would be possible to know its velocity and position, which would be contrary to the principle of Heisenberg So we can say that no electron revolves around a certain orbit around the nucleus, so we can only predict if the electron will be in the right position at the right time.
From there we find two definitions for electron orbital let's see:
- Orbital is considered the region of space, where each electron spends most of its time.
- Orbital is considered the region of space that is most likely to find an electron.
The number of protons in one atom of an element determines the atom’s identity and the number of electrons determines electrical charge of an element.
<u>Explanation:
</u>
Atoms are made up of protons, neutrons and electrons. The protons and neutrons are enclosed in a specific spherical region at the center of the atom termed as nucleus of the atom. This is because proton is positive charge and neutron is neutral charged high mass particles.
While the electrons are negative charged lighter mass particles. So the electrons will revolve around the nucleus. The protons number in element's one atom helps to identity its chemical properties of the element. While the electrons number in an element will determine the electrical charge and conducting nature of the element.
An alternating current changes position 50 to 60 times per second due to the changing charges at the ends of the wires. As the charges change from (+) to (-) and vice versa, the electrons in the wire change direction according to its attraction and repulsion from the charges. Whether a country uses 50 or 60 depends on its electrical system.
