Copper + sulfur create copper sulfide.
It's a lengthy process to find the empirical formula:
Sulfur:
Copper:
S:Cu => 
=> 
=> 
The empirical formula would just be 
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.
Answer:
The wavelength of the line in the absorption line spectrum of hydrogen caused by transition is 657.1 nm.
Explanation:
Energy of the electron in a hydrogen atom in nth shell:
Energy of an electron in n = 2:
Energy of an electron in n = 3:
Energy difference in between both the shells:
:
=
The wavelength of the line in the absorption line spectrum of hydrogen caused by transition is 657.1 nm.
4.8A
12/2.5=4.8, the current in this wire should be 4.8A
Answer:
A. Both freezing and melting are physical changes.
Explanation:
Even if you were to freeze water, the molecules are still water molecules, and vise versa with melting it.
