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wariber [46]
3 years ago
12

An atom's Lewis dot structure has four dots. Which of the following elements could it be, and why?

Chemistry
1 answer:
Elis [28]3 years ago
7 0

Answer:

Beryllium, because it is in period 2 and has four total electrons.

Explanation:

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A piece of hot metal is put into an equal mass of water. The water temperature rises 5o and the metal’s temperature drops 10o. W
Mice21 [21]

Answer:

The answer to your question is     Cm = 2.093 J/kg°C

Explanation:

Data

mass metal = mass of water

Δ water = 5°

Δ metal = 10°

Cm = ?

Cw = 4.186 J/Kg°C

Formula

              for metal       for water

               mCmΔTm  = mCwΔTw

Cancel mass of metal

                  Cm ΔTm  =  CwΔTw

solve for Cm

                         Cm = (CwΔTw) / ΔTm

Substitution

                         Cm = (4.186 x 5) / 10

Simplification

                         Cm = 20.93 / 10

Result

                         Cm = 2.093 J/kg°C

5 0
3 years ago
Why do lawmakers have so much to consider when debating effective energy policies 
astraxan [27]
Uh D lol I know it has something to do with energy
7 0
3 years ago
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What are the units for:<br> wavelength<br> frequency<br> energy
Oliga [24]

Answer:

wavelength.. meter

frequency.... Hertz (cycle per second)

energy.... Joule

5 0
4 years ago
The scattering of a stream of positively charged particles when striking a thin film of gold confirms that the positive charge i
GenaCL600 [577]

Answer:

According to Thompson's model, Every atom consists of a positively charged sphere of radius 10-- 10m in which entire mass and positive charge of the atom are uniformly distributed inside the sphere electrons are embedded like seeds in watermelon. According Rutherford entire poistive charge and mass of the atom are concentrated in a tiny central core of the atom which is called atomic nucleus contains. Size of nucleus = 10-- 15m. The nucleus contains protons and neutrons. Negatively charged electrons revolve around the nucleus in circular orbits.

Explanation:

8 0
3 years ago
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Which of the following are properties of mechanical waves? (pick more than 1)
Tamiku [17]

Answer:

I'd say ALL OF THE ABOVE.

A Mechanical wave is a disturbance that transfers energy as it moves through a medium without displacement of the medium itself.

It can Either be Transversal or Longitudinal.

It is Transversal when the particles of the medium move perpendicular to the wave motion.

It requires a medium and begin at a source with a disturbance

So

ALL THE OPTIONS SEEM LEGIT.

7 0
3 years ago
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