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Harrizon [31]
3 years ago
6

What type of element has 8 electrons in their outer most level?

Chemistry
2 answers:
zzz [600]3 years ago
7 0

It's the third one or Noble gases.

RideAnS [48]3 years ago
6 0

Answer:

Noble gases

Explanation:

Neon and argon have 8 electrons in their outermost shells. The elements which have 8 electrons in the outermost shell or in the valence shell,are known as the noble gases.

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Convert 3.2 moles of ch4 to number of molecules
REY [17]

Answer: 1.93 x 10^24 molecules

Explanation:

CH4 is the chemical formula for methane, the first member of the alkane family.

Based on Avogadro's law:

1 mole of any substance has 6.02 x 10^23 molecule

So, 1 mole of CH4 = 6.02 x 10^23 molecules

3.2 moles of CH4 = Z

To get the value of Z, cross multiply:

(Z x 1 mole) = (6.02 x 10^23 molecule x 3.2 moles)

Z•mole = 19.26 x 10^23 molecules•mole

Divide both sides by 1 mole

Z•mole / 1 mole = 19.26 x 10^23 molecules•mole/ 1mole

Z = 19.26 x 10^23 molecules

Place Z in standard form

Z = 1.93 x 10^24 molecules

Thus, 3.2 moles of ch4 has 1.93 x 10^24 molecules

3 0
4 years ago
What is equation for Na + Br2= NaBr
NeX [460]
Should be 2Na + Br2 = 2NaBr :)
6 0
3 years ago
3. A volcanologist discovers a volcano built from alternating layers of lava flow, ash, and cinders.
GenaCL600 [577]

Answer:

Composite volcano

Explanation:

Composite volcanoes are also known as stratovolcanoes. They are characterized by their steep sides and symmetrical features. These types of volcanoes are built slowly from the alternating layers of lava flow, ash and cinders erupting from the conduit system, which accumulate and add to the slopes of the volcano.

6 0
3 years ago
2.04 thermal and chemical change
bazaltina [42]

Explanation:

thermal changes are those in which heat exchange is involved like endothermic and exothermic

while in chemical changes collision between the reactant occurs which result into product

8 0
2 years ago
Which element has the smallest atomic radius
kupik [55]
Helium give me a thanks or brainiest answer if this helps! 
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3 years ago
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