Ozone in the stratosphere absorbs most of the ultraviolet radiation from the Sun. Without ozone, the Sun’s intense UV radiation would sterilize the Earth’s surface.

One ozone molecule decomposes to form one oxygen atom and a normal oxygen molecule. Hence the energy of UV radiation is absorbed in ozone layer even before reaching earth’s surface. That’s how ozone layer protects us from UV radiation.

Ozone is a particularly effective absorber of UV radiation.

62 miles

50 miles

In the US, “space” begins at 80.4km (50 miles), or 264,000 feet. General international consensus sets a similar limit for the start of space as 100km (62 miles), or 380,000 feet.

The Kármán line, an altitude of 100 km (62 mi) above sea level, is conventionally used as the start of outer space in space treaties and for aerospace records keeping.

Similar to skydiving, space diving is the act of jumping from an aircraft or spacecraft in near space and falling towards Earth. Alan Eustace set the current world record for highest and longest-distance free fall jump in 2014 when he jumped from 135,908 feet (41.425 km).

Space is not empty. A point in outer space is filled with gas, dust, a wind of charged particles from the stars, light from stars, cosmic rays, radiation left over from the Big Bang, gravity, electric and magnetic fields, and neutrinos from nuclear reactions.

99.9999999%

Atoms make up everything, but they also exist very, very far apart – and atoms themselves are more void than they are matter. Every atom has a nucleus surrounded by electrons. Every human on planet Earth is made up of millions and millions of atoms which all are 99% empty space.

You simply can’t walk through walls. Because according to the Pauli Exclusion Principle, no two particles can exist in the same place – it’s just impossible for both the particles — within the limits set by the uncertainty principle — to have the same position and same velocity.

Here’s The Reason You Can’t Actually Walk Through Walls, According to Science. You’ve probably heard that the atoms that make up your body and all other normal matter in the Universe are mostly empty space. Solid enough the elements in our atoms can’t just pass through the empty spaces of other atoms, and vice versa.

If you’ve ever tried the experiment, you know you can’t walk through a wall. But subatomic particles can pull off similar feats through a weird process called quantum tunneling. Tunneling would be an even bigger achievement.

You don’t actually “touch” anything at any level. When we “touch” something, the atoms of our fingertips approach the atoms of the surface we’re “touching”, at which point atomic forces prevent any closer proximity. The resistance we feel is actually mutual atomic repulsion from a distance.

The answer to the main question is YES. Two electrons will “touch” each other when their centers are at a separation equal to one electron diameter.

No atoms themselves do not die, because they are not alive, they do make up the elements used to make live things but them are not alive.

An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.

Atoms cannot be created or destroyed. Atoms of different elements may combine with each other in a fixed, simple, whole number ratios to form compound atoms.

When we die, our atoms will disassemble and move off to finds new uses elsewhere – as part of a leaf or other human being or a drop of dew. Atoms themselves, however go on practically forever. Bill Bryson’s, A Short History of Nearly Everything, 2003 Won the Aventis prize for Science books in 2004.