10 facts of chemistry
Answers
Explanation:
The only solid elements that assume liquid form at room temperature are bromine and mercury. However, you can melt gallium by holding a lump in the warmth of your hand.
Unlike many substances, water expands as it freezes. An ice cube takes up about 9% more volume than the water used to make it.
If you pour a handful of salt into a full glass of water, the water level will actually go down rather than overflowing the glass.
Similarly, if you mix half a liter of alcohol and half a liter of water, the total volume of the liquid will be less than one liter.
There is about 1/2 lb or 250 g of salt (NaCl) in the average adult human body.
A pure element takes many forms. For example, diamond and graphite both are forms of pure carbon.
Many radioactive elements actually glow in the dark.
The chemical name for water (H2O) is dihydrogen monoxide.
The only letter not appearing on the periodic table is J.
Lightning strikes produce O3, which is ozone, and strengthen the ozone layer of the atmosphere.
The only two non-silvery metals are gold and copper.
Although oxygen gas is colorless, the liquid and solid forms of oxygen are blue.
Explanation:
1 The only solid elements that assume liquid form at room temperature are bromine and mercury. However, you can melt gallium by holding a lump in the warmth of your hand.
2 Unlike many substances, water expands as it freezes. An ice cube takes up about 9% more volume than the water used to make it.
3 If you pour a handful of salt into a full glass of water, the water level will actually go down rather than overflowing the glass.
4 Similarly, if you mix half a liter of alcohol and half a liter of water, the total volume of the liquid will be less than one liter
5 There is about 1/2 lb or 250 g of salt (NaCl) in the average adult human body.
6 A pure element takes many forms. For example, diamond and graphite both are forms of pure carbon.
7 Many radioactive elements actually glow in the dark.
8 The chemical name for water (H2O) is dihydrogen monoxide.
9 The only letter not appearing on the periodic table is J.
10 The only two non-silvery metals are gold and copper.