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
Olenka [21]
4 years ago
12

How was helium first discovered?

Chemistry
2 answers:
Igoryamba4 years ago
6 0

Using spectral analysis of the Sun's emission spectra.

dedylja [7]4 years ago
4 0

Answer:

Explanation:

It was the French astronomer Jules Janssen who discovered the helium. He observed that during the solar eclipse a bright yellow line is observed when the eclipse is viewed through a prism. Later on Norman Lockyer verified that the yellow lining was due to the helium gas and in 1907, Ernest Rutherford and Thomas Royds  proved that an alpha particle is actually helium gas.

You might be interested in
24. What type of cloud is in the picture?<br> cumulus<br> cirrus<br> altostratus<br> stratus
vova2212 [387]

Explanation:

alto cumulus is the pic

6 0
3 years ago
The number of ATPs per NADH generated by the electron transport system is higher than the number generated per FADH2 because ___
photoshop1234 [79]

Answer:

FADH2 has a lower (less negative) redox potential than NADH does

Explanation:

Flavin Adenine Dinucleotide (FAD) and Nicotinamide Adenine Dinucleotide (NAD) are redox cofactors that play important functions for mitochondrial activity and cellular redox balance. Both coenzymes exist in two forms: an oxidized and a reduced, which are abbreviated as NAD/FAD and NADH/FADH2, respectively. These reduced forms (NADH and FADH2) are produced in the Krebs cycle during respiration. FADH2 has lower redox potential than NADH because FADH2 is only capable of activating 2 proton pumps, while NADH can activate 3 proton pumps during the electron transport chain, thereby FADH2 generates a minor number of ATP molecules than NADH.

4 0
4 years ago
Equilibrium is characterized by
Hatshy [7]

Answer:

the thenhow to be my favorite you want to go don't think I love you too I don't think so ako wala load it out and then the words of the is being proud of you Fouck you Fouck

Explanation:

good morning I love you too baby girl women it's a

6 0
3 years ago
A) ¿De qué trata el cuento que leíste?<br>​
NISA [10]

No hablo espanol could you put it in English?

4 0
3 years ago
How many hydrogen atoms are in water?
Viefleur [7K]
Water is H2O. hydrogen atom is H1 O2
so hydrogen atom is H2
3 0
3 years ago
Other questions:
  • A 3.00-liter sample of gas is at 288 K and 1.00 atm. If the pressure of the gas is increased to 2.00 atm and its volume is decre
    10·1 answer
  • What volume of a 2.00 m kcl solution is required to prepare 500. ml of a 0.100 m kcl solution?
    9·1 answer
  • What is one way that electric charges are different from magnetic poles?
    11·1 answer
  • The addictive power of nicotine is enhanced by which of the following chemicals?
    14·1 answer
  • 5. AB + C + AC + B
    7·1 answer
  • Calculate the molality of a solution formed by dissolving 34.8 g of lii in 500.0 ml of water. calculate the molality of a soluti
    15·2 answers
  • Which element has a higher ionization energy? chlorine or bromine
    6·2 answers
  • Which term describes the composition of matter shown in figure A
    13·1 answer
  • A precipitate forms when mixing solutions of sodium fluoride (NaF) and lead II nitrate (Pb(NO3)2). Complete and balance the net
    13·1 answer
  • The teacher said the volume of the liquid was 500 mL when measured a student found it was 499.7 mL what is the students percent
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!