Which is the first element of Group 16?

Oxygen

Which group 16 element has only unstable isotopes?

The chalcogens are the first group in the p block to have no stable metallic elements. All isotopes of polonium (Po), the only metal in group 16, are radioactive, and only one element in the group, tellurium (Te), can even be described as a semimetal.

Why are the chemical properties of Na K and Rb similar?

The reason for the similarity in a group is due the outer shell with valence electrons. So in Group 1A, which contains H, Li, Na, K, Rb, Cs, Fr, they have one valence electron or some may have similar physical properties as well ex.

Does oxygen have light transmission?

Oxygen acts pretty much the same way. Because of their structural simplicity, nitrogen and oxygen, which together make up 99 percent of the earth’s atmosphere, absorb relatively small amounts of the visible light energy coming from the sun that passes through the air.

What is the role of oxygen in atmosphere?

About 21% of Earth’s atmosphere is oxygen. Oxygen plays a critical role in respiration, the energy-producing chemistry that drives the metabolisms of most living things. We humans, along with many other creatures, need oxygen in the air we breathe to stay alive.

Are the properties of oxygen?

Chemical properties of oxygen – Health effects of oxygen – Environmental effects of oxygen

Atomic number	8
Electronegativity according to Pauling	3.5
Density	1.429 kg/m3 at 20°C
Melting point	-219 °C
Boiling point	-183 °C

What are 6 interesting facts about oxygen?

20 Fun Oxygen Facts for Kids

Animals and plants require oxygen for respiration.
Oxygen gas is colorless, odorless, and tasteless.
Liquid and solid oxygen are pale blue.
Oxygen also occurs in other colors, including red, pink, orange, and black.
Oxygen is a non-metal.
Oxygen gas normally is the divalent molecule O2.
Oxygen supports combustion.