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BartSMP [9]
3 years ago
14

Why pure hydrogen is not used in ballons ?​

Chemistry
1 answer:
wariber [46]3 years ago
8 0

Answer:  Hydrogen that is not used in balloons because hydrogen burns very easily.

pls mark brainliest

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Idoine would have chemical properties most like ?
svetlana [45]
Iodine would have chemical properties most like Fluorine, Chlorine and other elements in group 7
7 0
3 years ago
What do you understand by valency electron and valency shell?​
jasenka [17]

Answer:

<h2>total no. of electron present in Valency shell is called valency electron </h2><h2>___________________</h2>

<h2>valency shell is that in which last electron is present</h2>

7 0
3 years ago
Which solid conducts electricity most efficiently?
irina1246 [14]

We see that is the <em>structure </em>of graphite it possess these attributes.

Graphite

Option A

<h3>Electricity</h3>

Generally, he conduction of electricity is do by elements with free talent electron after bonding.

Therefore, it is save to say that the <em>solid </em>that possess the attributes that allows for conduction will end up conducting.

Hence, we see that is the <em>structure </em>of graphite it possess these attributes.

Graphite

Option A

For more information on Electricity visit

brainly.com/question/9383604

4 0
2 years ago
The total number of the elements above with 2 valence electron is ____.
OverLord2011 [107]

Answer:

four elements

Explanation:

He = 1s²

Be = 1s² 2s²

C = 1s² 2s² 2p²

Mg = 1s² 2s² 2p⁶ 3s²

Si = 1s² 2s² 2p⁶ 3s² 3p²

Ca = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

Valence electrons are those electrons which are present in outer most electronic shell.

He, Be, Mg, Ca these four elements have 2 valence electrons.

While Si and C have four valance electrons.

4 0
2 years ago
C. How is EM created?
Arada [10]
EM is created by moving charges back and forth will produce oscillating electric and magnetic fields, and these travel at the speed of light
6 0
3 years ago
Read 2 more answers
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