1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lana71 [14]
3 years ago
12

What causes metal to emit light?​

Chemistry
2 answers:
Flauer [41]3 years ago
5 0
Heating an atom excites its electrons and they jump to higher energy levels. When the electrons return to lower energy levels, they emit energy in the form of light. ... Every element has a different number of electrons and a different set of energy levels. Thus, each element emits its own set of colours.
seraphim [82]3 years ago
4 0
Heat. Heating atoms causes its electrons to jump to higher energy levels; they emit energy in light form.
You might be interested in
Which best describes the effect of jj Thomson discovery
beks73 [17]
JJ Thomson discovered electrons using the cathode ray. Electrons are negatively charged particles that orbit around the nucleus of an atom. Finding out that there was a negative charge to balance out the positive charge. This later helped develop Hund's Rule and the Pauli Exclusion Principle.
7 0
3 years ago
If you have 110.0 grams of an unknown compound that contains 12.3 grams of hydrogen, what is the percent by mass of hydrogen in
Vladimir [108]
All you have to do is a simple division "parts over the whole"

12.3 grams H/ 110 grams compound x 100= 11.2%
8 0
3 years ago
Read 2 more answers
How many kilojoules are released when 8.2 g of water condenses at 100 °c and cools to 15 °c?
MrRa [10]

Answer:- 2.92 kJ of heat is released.

Solution:- We have water at 100 degree C and it's going to be cool to 15 degree C.

So, change in temperature, \Delta T = 15 - 100 = -85 degree C

mass of water, m = 8.2 g

specific heat of water, c = 4.184\frac{J}{^0C.g}

The equation used for solving this type of problems is:

q=mc\Delta T

Let's plug in the values in the equation and solve it for q which is the heat energy:

q = (8.2)(4.184)(-85)

q = -2916.248 J

They want answer in kJ. So, let's convert J to kJ and for this we divide by 1000.

q=-2916.248J(\frac{1kJ}{1000J})

q = -2.92 kJ

Negative sign indicates the heat is released. So, in the above process of coiling of water, 2.92 kJ of heat is released.

3 0
3 years ago
Meet /svc-jgyu-fii<br>join​
arsen [322]

Answer:

what are we doing there???

bye, have a nice day!

5 0
3 years ago
Describe the PURPOSE of Moh's hardness scale. (What information does it tell you)
Lerok [7]

Answer: The Mohs Hardness Scale is used as a convenient way to help identify minerals. A mineral's hardness is a measure of its relative resistance to scratching, measured by scratching the mineral against another substance of known hardness on the Mohs Hardness Scale.

Explanation: Hope this helped! :)

6 0
3 years ago
Other questions:
  • How is chemical energy useful? Give three examples.
    5·1 answer
  • Explain why the reaction is classified as an addition reaction
    14·1 answer
  • The ph of lemon juice is approximately 2.4. at this ph, the hydronium ion concentration is closest to which value? 1. 250 m 2. 4
    11·2 answers
  • A 0.6-m3 rigid tank is filled with saturated liquid water at 135°C. A valve at the bottom of the tank is now opened, and one-hal
    13·1 answer
  • What is relative point​
    11·2 answers
  • Calculate the molarity of a KCl solution if 37.3 g of KCl are dissolved in water to give a
    12·1 answer
  • In the 1860's the Central Pacific Railroad company employed the chemist James Howden to make an explosive capable of blasting th
    12·1 answer
  • What is the % of each element in (NH4)2(SO4)?
    9·1 answer
  • You add 8.5 g of iron to 27.90 mLof water and observe that the volume of iron and water together is 28.98 mL calculate the densi
    12·1 answer
  • If one of the waste products of cellular respiration is CO2 by means of exhaling, then do you think the rate of cellular respira
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!