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prohojiy [21]
3 years ago
15

Why does helium have more spectral lines than hydrogen?

Physics
1 answer:
Lynna [10]3 years ago
8 0

<span>This is because Helium has two valence electrons compared to Hydrogen which has only one. Helium has more energy levels for an electron to jump thus more spectral lines to occur. The spectral lines relating to each change of energy level would be more grouped together and hence the greater chance of them falling in the visible range.</span>

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D the element in blue square has a full outer shell, due to it’s location on the periodic table, so it will not react with other
Juliette [100K]
The correct response that will be used to describe this particular element would be the third option, since all of the other options are incorrect and apply to different elements in their groups. The element is a metal and will react with a non metal.






5 0
3 years ago
The compound ethylene (C2H4) is represented by this diagram. What statement best describes the arrangement of the atoms in an et
Effectus [21]

<u>Answer:</u> The correct answer is two electrons are shared between each hydrogen atom and the carbon atom bonded to it, and four electrons are shared between the carbon atoms.

<u>Explanation:</u>

Ethylene is a compound given by the chemical formula H_2C=CH_2.

The bond present between hydrogen and carbon atoms or carbon and carbon atoms are covalent bonds. A covalent bond is formed by the sharing of electrons between the atoms combining.

A double bond is present between carbon and carbon atoms. So 2 pairs of electrons are shared which means in total of 4 electrons are shared.

Bond present between hydrogen and carbon atoms are single bonds. So, a pair of electrons is shared which means that in total of 2 electrons are shared.

Hence, the correct answer is two electrons are shared between each hydrogen atom and the carbon atom bonded to it, and four electrons are shared between the carbon atoms.

6 0
3 years ago
Read 2 more answers
The radius of an atom can be measured directly?
Marrrta [24]
The radius of an atom can not be measured directly sir. So false
4 0
3 years ago
Read 2 more answers
Heat is transferred from your body into an ice cube by
Dima020 [189]
2.) <span>Heat is transferred from your body into an ice cube by "Conduction"

3.) </span><span>The loudness of a sound will be determined by the wave’s "Frequency"

4.) </span>The speed of a sound wave <span>"is slower than an electromagnetic wave"

Hope this helps!
</span>
3 0
2 years ago
I NEED HELP PLEASE, thanks! :)
topjm [15]

Answer:

2.96×10⁸ m/s

Explanation:

Speed = distance / time

v = (2 × 3.85×10⁸ m) / (2.60 s)

v = 2.96×10⁸ m/s

6 0
3 years ago
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