Table of Contents
What element has shiny yellow crystals?
Sulfur is a chemical element with an atomic number of 16 and an atomic symbol of S. At room temperature it is a yellow crystalline solid. Even though it is insoluble in water, it is one of the most versatile elements at forming compounds.
What element makes sand but not diamonds?
It and oxygen are the two elements that make sand but not diamonds.” What element is he speaking of?
What gas has 3 electron orbits?
mc 1-5
| Question | Answer |
|---|---|
| 2nd clue – The holograph of Mendeleev appears again through the shifting gas. “This element has 3 electron orbits or shells.” | Room3-Clue2 |
| 3rd clue – This element is used in the water treatment process. | Room3-clue3 |
| 4th clue – This element has 17 protons. | Room3-Clue4 |
What element occurs in teeth?
As calcium hydroxyl phosphate, it is the principal inorganic constituent of teeth and bones and occurs as the mineral apatite. As calcium fluoride, it occurs as fluorite, or fluorspar. And as calcium sulfate, it occurs as anhydrite.
What diatomic gas is a halogen?
All of the halogens exist as diatomic molecules. This means that the elements are made up of pairs of atoms that are chemically joined together (for example, fluorine exists as F 2, chlorine as Cl 2, bromine as Br 2 and iodine as I 2).
What period is sulfur in?
Period 3
Fact box
| Group | 16 | Melting point |
|---|---|---|
| Period | 3 | Boiling point |
| Block | p | Density (g cm−3) |
| Atomic number | 16 | Relative atomic mass |
| State at 20°C | Solid | Key isotopes |
What element is a light gray metal?
Pure tungsten is a light gray or whitish metal that is soft enough to be cut with a hacksaw and ductile enough to be drawn into wire or extruded into various shapes.
Which two elements make up human teeth?
In dentin, there are only two elements like fluorine and iron. The enamel requires some more elements since it is the physical protection of the teeth itself. More elements makes enamel more resilient and stronger.
Are halogens poisonous?
The halogens are poisonous, and chlorine gas and chlorine compounds have been used as chemical weapons. In small concentrations, chlorine is used to disinfect drinking water and to disinfect swimming pools.
Why does my gas heater have a yellow flame?
Incorrect Flame Colors If the pilot light in your gas heater shows a lot of yellow, orange, red, purple or green color, this indicates inefficient combustion because other condensates are burning along with the methane. These condensates might include tar, dust, rust or oil, all of which are potentially hazardous chemicals.
What makes a flame glow yellow in a pyrotechnic reaction?
Sodium compounds glow yellow in a flame. A pyrotechnic colorant is a chemical compound which causes a flame to burn with a particular color. These are used to create the colors in pyrotechnic compositions like fireworks and colored fires. The color-producing species are usually created from other chemicals during the reaction.
What causes a flame to have a green color?
The green color comes from emission lines emitted from the copper (II) ions or the boron ions which are heated in the flame.
Which is the coolest color to turn Flames?
Green flame is possibly the coolest color to turn flames. It’s not a color you get from the fuel, so you have to add a chemical to get the effect. The color comes from the ion emission spectra, so you can use any of the chemicals that produce green in the analytical method known as the flame test. The most readily available compounds are: