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larisa [96]
3 years ago
14

Our bodies are penetrated by x-rays but not by visible light. Is this because x-rays travel faster than visible light? Yes or no

?
Chemistry
1 answer:
Art [367]3 years ago
8 0

No, x-rays travel at the same observable speed as any other electromagnetic wave including light.

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Which tools are used to measure weather? Choose all answers that are correct. A. barometer B. rain gauge C. anemometer D. speedo
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¿Cuántos moles de C3H8 contienen 9.25 x 10^24 moléculas?
Igoryamba

Answer:

\large \boxed{\text{e. 15.4 mol C$_{3}$H}_{8}}

Explanation:\text{Moles of propane} = 9.25 \times 10^{24}\text{ molecules} \times \dfrac{\text{1 mol }}{6.022 \times\ 10^{23} \text{molecules}} = \textbf{15.4 mol}

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J. Explain how an atom's valence electron configuration determines its place on the periodic table.​
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Answer:

Elements having same valence electrons are placed in <u>same group.</u>

Explanation:

First, let's start with some basic concepts of modern periodic table:

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The Modern periodic table is divided into Periods and groups .

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Same period have same number of atomic orbital(Shell)

Group : The group is the vertical columns . There are 18 groups in the modern periodic table.Those element which have same group number will also have same number of electron in their outermost shell. The number of electron in the outermost shell determines the valency of the element.

So, elements showing same valency are placed in same group.

All alkali are place in group 1 and have 1 valance electron in the outermost shell

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3 years ago
Does anyone know the ones that are blank
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What is it asking for?
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