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devlian [24]
2 years ago
9

What is the distinction between magma and lava​

Chemistry
1 answer:
lesya692 [45]2 years ago
7 0

Answer:

Scientists use the term magma for molten rock that is underground and lava for molten rock that breaks through the Earth's surface.

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An exciton is: A charged particle made of electrons A charged particle made of holes A neutral particle made of an electron and
Alex

Answer:

A neutral particle made of an electron and hole

Explanation:

Exciton

It is the combination of an electron and a hole ( hole refers to the vacancy of an electron ) . And , as both the electron and the hole have the same charge but the polarity is opposite , the combination will lead to a neutral compound , i.e. ,  Exciton have no charge and so neutral .

It is free to move in the nonmetallic crystal and since it charge less , it is difficult to detect it directly .

7 0
3 years ago
What are some ways we can monitor earthquakes ?
a_sh-v [17]

Answer:

Earthquakes are measured using instruments called seismometers, that detect the vibrations caused by seismic waves as they travel through the crust. Also, laser beams can be used

Explanation:

5 0
3 years ago
Which element has the greatest electronegativity?
ki77a [65]

Fluorine is the most electronegative element, while francium is one of the least electronegative.
7 0
3 years ago
How many attoms are equal 6.19 moles of hydrogen?​
Wittaler [7]

Answer:

3.727x10^24 atoms.

Explanation:

When calculating how many molecules are in a compound or element, we refer to Avogardo's number.

Your equation will look like this: 1 mole/ 6.022x10^23 molecules (Avogardo's number).

Multiply 6.19 by Avogardo's number to get your answer.

4 0
3 years ago
The strong force governs what goes on in the nucleus of atoms.
liubo4ka [24]
Maybe u should choose D beacause it makes more sense.
6 0
3 years ago
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