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
Archy [21]
3 years ago
13

What characteristic bright line spectrum of an elementforced when electrons?

Chemistry
1 answer:
emmasim [6.3K]3 years ago
8 0

The characteristic bright-line spectrum of an element is produced when its electrons return to lower energy levels To be in the ground state all electrons must be in their lowest energy state; all excited atoms must lose energy. The lost energy appears in the form of light. Hope this helped :)
You might be interested in
Give the result of the following expression with the correct number of significant figures
Marianna [84]
84 m/s x 31.221 s = 2600 m
-rounded from 2622.564 m because 84 m/s has only two significant figures
4 0
3 years ago
What are elementary particles the make up protons and nuetrons
ahrayia [7]

they are made by of two types of elementary particles

electrons and quarks

quetion answered by

 (jacemorris04)

4 0
3 years ago
Read 2 more answers
Calculate the ph of a 0.021 m nacn solution. [ka(hcn) = 4.9  10–10]
ohaa [14]

<span>Answer is: pH of solution of sodium cyanide is 11.3.
Chemical reaction 1: NaCN(aq) → CN</span>⁻(aq) + Na⁺<span>(aq).
Chemical reaction 2: CN</span>⁻ + H₂O(l) ⇄ HCN(aq) + OH⁻<span>(aq).
c(NaCN) = c(CN</span>⁻<span>) = 0.021 M.
Ka(HCN) =  4.9·10</span>⁻¹⁰<span>.
Kb(CN</span>⁻) = 10⁻¹⁴ ÷ 4.9·10⁻¹⁰ = 2.04·10⁻⁵<span>.
Kb = [HCN] · [OH</span>⁻] / [CN⁻<span>].
[HCN] · [OH</span>⁻<span>] = x.
[CN</span>⁻<span>] = 0.021 M - x..
2.04·10</span>⁻⁵<span> = x² / (0.021 M - x).
Solve quadratic equation: x = [OH</span>⁻<span>] = 0.00198 M.
pOH = -log(0.00198 M) = 2.70.
pH = 14 - 2.70 = 11.3.</span>

4 0
3 years ago
A student mixed two chemicals to allow them to
Westkost [7]

Answer:

B .it is an exothermic reaction

Explanation:

i need brainleyest

4 0
2 years ago
By how many degrees Celsius would the temperature of 3000 g of a substance
Amiraneli [1.4K]

Explanation:

do u have good grades even?bruh u should have studied because I'm sure as hell am not going to answer this for u baby.

3 0
3 years ago
Other questions:
  • How many grams of the excess reactant are left over according to the reaction below given that you start with 10.0 g of Al and 1
    8·2 answers
  • A volatile organic liquid with known molecular weight is added to a vapor density flask which has a known volume. The flask is h
    5·1 answer
  • How many moles of ethane (C2H6) would be needed to react with 62.3 grams of oxygen gas?
    11·1 answer
  • The elements least likely to form bonds are found in which group? 15, 16, 17, 18
    15·2 answers
  • Try It: Evidence of Population Change
    14·1 answer
  • Can somebody try and answer 1 of these questions also for 5 answer in 3 sentences thx!!!!
    5·1 answer
  • Review
    6·1 answer
  • Is there a relationship between the number of black boxes and any of the water pumps
    14·1 answer
  • What is the term for metabolic pathways that use ATP to synthesize complex molecules from smaller components?
    10·1 answer
  • What do all fossil fuels have in common?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!