Answer:
Halogens
Explanation:
All the elements in Group 17 on the periodic table are classified as halogens. The members of this group are:
- Fluorine
- Chlorine
- Bromine
- Iodine
- Astatine
They are also known as the group VIIA
Their general outer energy level structure is ns² np⁵
- The first four members of the group are common. Fluorine is the most reactive non-metal and iodine is less reactive.
- Due to lack of one electron to complete their outermost shell, they are good oxidizing agents and are univalent.
The basic tastes of sweet, salty and sour have different thresholds, or concentration levels, at which they can be detected. In other words, it is easier to detect some flavors at low concentrations compared with other flavors. Taste thresholds can vary from person to person.
Answer:
urban heat island
Explanation:
occurs when a city experiences much warmer temperatures than nearby rural areas.
Mark me brainliest.
<span>According the the first of thermodynamics, energy is
neither created nor destroyed, energy is simply converted to other forms of
energy. So in this case, heat is also a type of energy so when it flows out of
the system, therefore this means that some of the initial potential energy was
converted to heat and then flowed out of the system. Therefore potential energy
will decrease.</span>
Answer:
You know that a chemical reaction has taken place because there is a material a color change.
Explanation:
