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nikitadnepr [17]
3 years ago
12

An orbital is defined as a region of the most probable location of

Chemistry
1 answer:
alexira [117]3 years ago
6 0
The nucleus is the centre of an atom, and it's assumed that is where the proton and neutron are located. Electrons are though to orbit around the nucleus, so the answer is (1) an electron
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All the following ions have the same charge except Group of answer choices oxide. monohydrogen phosphate. peroxide. permanganate
Triss [41]

All the given species have the same charge except peroxide.

<h3>Charges on ions</h3>
  • The charge on monohydrogen phosphate is negative because of its formula, [HPO4]^{2-}.

  • The charge on permanganate is negative. The formula is MnO^-

  • The charge of oxide (O^{2-}) is negative.

  • The charge on peroxide is ( R−O−O−R) is neutral.

  • The charge on oxalate, C2O4^{2-}, is negative.

Thus, only peroxide is unique.

More on charges on ions can be found here: brainly.com/question/11938054

#SPJ3

4 0
2 years ago
Why are dark matter and dark energy described as "dark"? A. Because they emit blackbody radiation. B. Because they absorb light.
VMariaS [17]

Answer:

D. Because we cannot easily detect them.  

Explanation:

Dark matter are called dark because using existing astronomical instruments we are blinded to them. Dark matter and dark energy are difficult to detect and properly observe. As we know that the whole universe is made up of matter, some of the matter do not interact with the electromagnetic radiations which makes undetectable.

8 0
4 years ago
Which element has the same number of energy levels as krypton (Kr) and the same number of valence electrons as nitrogen (N)?
Alex
The correct answer is indeed Arsenic (As). This is the element that fits the description of being in period 4 and group 5, just like Krypton and Nitrogen.
5 0
4 years ago
Calculate the number of moles of bromine present in 20.5 mL of Br2(l), whose density is 3.12 g/mL.
LuckyWell [14K]

There are 0.400 mol Br₂ in the sample..

Mass of Br₂ = 20.5 mL Br₂ × 3.12 g Br₂/1 mL Br₂ = 63.96 g Br₂.

Moles of Br₂ = 63.96 g Br₂ × (1 mol Br₂/159.81 mol Br₂) = 0.400 mol Br₂

8 0
4 years ago
Hydrogen (H) and helium (He) are produced in the core of stars in a process called nuclear fusion. Over time stars begin to prod
rosijanka [135]
A C and D are all correct, Helium and Hydrogen only have a 1s orbital, and helium has 2 protons, while hydrogen has 1, and finally Hydrogen has no neutrons while helium has 2. Helium does not however have 8 valence electrons as the 1s orbital can only hold 2, meaning B is the “correct” (false) answer.
4 0
3 years ago
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