4,5,6,9
The element with 3 energy levels and 8 neutrons in its outer energy level is oxygen, with the symbol O. Oxygen has 8 protons and 8 neutrons in its nucleus, with 2 electrons in its inner energy level and 6 electrons in its outer energy level.
Sharing of electrons in the outer energy level of two atoms results in a covalent bond.
The boundary at an altitude of 100 km above sea level is known as the Kármán line. It is commonly accepted as the point where the Earth's atmosphere ends and outer space begins. At this altitude, the air density is very low, and spacecraft can achieve orbit without being affected by atmospheric drag.
The outer layer is atmosphere.
The pressure at sea level on Earth is about 14.7 pounds per square inch (psi), while the pressure in outer space is close to zero psi. This means that there is a pressure difference of 14.7 psi between sea level on Earth and outer space.
One electron in outermost energy level.
Energy levels
Nonmetals almost have a full outer energy level while metals have few electrons in their outer energy level.
There can only be 1 outer energy level.
The element with 3 energy levels and 8 neutrons in its outer energy level is oxygen, with the symbol O. Oxygen has 8 protons and 8 neutrons in its nucleus, with 2 electrons in its inner energy level and 6 electrons in its outer energy level.
The Kármán line, which marks the boundary between Earth's atmosphere and outer space, is typically considered to be around 62 miles (100 kilometers) above sea level.
The highest level of the atmosphere is the exosphere, which starts at about 500 kilometers above the Earth's surface and extends out to about 10,000 kilometers. This region is where the atmosphere gradually transitions into outer space and where satellites orbit the Earth.
Earth's atmosphere extends to about 10,000 km (6,200 miles) above sea level, but its density becomes increasingly thinner as altitude increases. The boundary between Earth's atmosphere and outer space is known as the Karman line, which is located at an altitude of 100 km (62 miles) above sea level.
The strong lower part of the mantle between the asthenosphere and the outer core is called the lower mantle. The layer of the atmosphere between the stratosphere and the thermosphere is called the mesosphere.
Na, or Sodium, has 3 energy levels. Two electrons in the first level, eight in the second, and one in the third (and outer most) level.
Hydrogen has only 1 electron and has only 1 energy level.
Beryllium and magnesium have two electrons in their outermost energy level, as do all Group 2 elements.