3 years ago

Which of these is an element A. Sugar B. Salad. C. Potassium D. Water

Chemistry

2 answers:

lapo4ka [179]3 years ago

6 0

(C)Potassium is an element.......

julsineya [31]3 years ago

6 0

The right option is; C. Potassium

An element is any of the simplest chemical substances that cannot be decomposed in a chemical reaction. Every element is composed of its own type of atom that has the same number of protons. The periodic table contains all the recognized elements and groups that have similar properties. Other types of elements apart from potassium include hydrogen, lithium, helium, boron, oxygen, magnesium, sulfur etc.

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A rectangular corral of widths Lx = L and Ly = 2L contains seven electrons. What is the energy of (a) the first excited state, (

DiKsa [7]

Answer:

See explaination

Explanation:

The invariant mass of an electron is approximately9. 109×10−31 kilograms, or5. 489×10−4 atomic mass units. On the basis of Einstein's principle of mass–energy equivalence, this mass corresponds to a rest energy of 0.511 MeV.

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