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Degger [83]
3 years ago
13

Why do you think elements must be heated before they emit colored light?

Chemistry
1 answer:
Mademuasel [1]3 years ago
4 0
The colored light emitted is energy and in order to emit energy the element should first obtain energy. The energy absorbed by the substance can be in the form of radiation, heat or electricity. Hope this answers the question. Have a nice day.
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3. If the dartboard below is used to model an atom, which subatomic particles would be located at Z?
yarga [219]

Answer : The protons and neutrons subatomic particles will be located at Z.

Explanation :

In the model of an atom, there are three subatomic particles. Protons, neutrons and electrons are the subatomic particles.

The protons and the neutrons subatomic particles are located inside the nucleus and the electrons subatomic particle are located around or outside the nucleus.

The protons are positively charged, electrons are negatively charged and neutrons are neutral that means it has no charge.

In the given dartboard, Z is the nucleus in which the protons and neutrons subatomic particles are present and x, w & y are the electrons because they are located around the nucleus.

Hence, the protons and neutrons subatomic particles will be located at Z.

3 0
3 years ago
Whats the formula for density
Sergio039 [100]

p =\frac{m}{V}

<em>p equals m over V</em>

hope this helps!!

7 0
3 years ago
Read 2 more answers
A dangerous condition in a nuclear reactor when fuel rods melt is called
Gnesinka [82]

Answer:

A dangerous condition in a nuclear reactor when fuel rods melt is called NUCLEAR MELTDOWN

4 0
4 years ago
. Which state of matter has a defined volume but no defined shape?<br> HELPPPP PLEASE FAST
vodomira [7]

Answer:

liquid

Explanation:

it's not plasma, solid, or gas

so I think liquid

3 0
3 years ago
Read 2 more answers
The lifetime of a human is approximately 71 years. Which of the following is this number closest to? Remember the following conv
jarptica [38.1K]

2.2Giga

Explanation:

Given that the number of years = 71years

We need to convert this to seconds;

   60s = 1 min

    60 min = 1hr

   24hr = 1 day

   7 days = 1 week

    52 weeks = 1yr

 71 years x \frac{52weeks }{1yr}  x \frac{7 days}{1 week } x \frac{24hr}{ 1day }  x \frac{60min}{1hr} x \frac{60s}{1min}  = 2,232,921,600‬s

This value is 2.2 x 10⁹s  = 2.2Giga

learn more:

Conversion brainly.com/question/555814

#learnwithBrainly

7 0
3 years ago
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