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kozerog [31]
4 years ago
14

Is this sentence true or false ? hydrogen is considered to be a metal

Chemistry
2 answers:
blsea [12.9K]4 years ago
8 0
It is considered to be because of its similarities in electrons but ultimately it is not.
victus00 [196]4 years ago
4 0
It is false, hope this helps!
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Which of the following symbols would be included in the noble gas notation for an element that had valence electrons in the
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Answer: C.) Xe

Explanation: To figure out the answer go to the Noble Gas Family and count down 5 elements.

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3 years ago
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A grating has 470 lines/mm. how many orders of the visible wavelength 538 nm can it produce in addition to the m = 0 order?
maria [59]

Three complete orders on each side of the m=0 order can be produced in addition to the m = 0 order.

The ruling separation is

d=1 / (470mm −1) = 2.1×10⁻³ mm

Diffraction lines occur at angles θ such that dsinθ=mλ, where λ is the wavelength and m is an integer.

Notice that for a given order, the line associated with a long wavelength is produced at a greater angle than the line associated with a shorter wavelength.

We take λ to be the longest wavelength in the visible spectrum (538nm) and find the greatest integer value of m such that θ is less than 90°.

That is, find the greatest integer value of m for which mλ<d.

since  d / λ = 538×10⁻⁹m / 2.1×10 −6 m ≈ 3

that value is m=3.

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The second and third orders overlap.

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7 0
2 years ago
At STP, which 2.0-gram sample of matter uniformly fills a 340-milliliter closed container?
Xelga [282]

Answer;

D, Xe (g)

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If 2g has a volume of 340ml.

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Answer is Xe

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3 years ago
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2 years ago
Convert 25.0g of KMnO4 to moles
Gnom [1K]

Answer:

158.033949

Explanation:

4 0
4 years ago
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