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
kirill115 [55]
4 years ago
11

What is the period number in which helium is found?

Chemistry
1 answer:
Svetradugi [14.3K]4 years ago
8 0

Answer: period one

Explanation:

Helium is located in period 1, group 18 of the Periodic Table and has an atomic number equal to 2.

You might be interested in
How many moles of methane (CH4) could be made from 4.6 moles of hydrogen?
DENIUS [597]

Answer:

Number of moles of methane form = 2.3 mol

Explanation:

Given data:

Number of moles of Hydrogen = 4.6 mol

Number of moles of methane form = ?

Solution:

Chemical equation:

C + 2H₂     →   CH₄

Now we will compare the moles of methane with hydrogen from balance chemical equation.

                     H₂              :           CH₄

                       2              :             1

                     4.6             :            1/2×4.6 = 2.3 mol  

Form 3.6 moles of hydrogen 2.3 moles of methane can be formed.

6 0
3 years ago
HELP PLEASE 100 points!!!
djyliett [7]

Answer:

by the looks of it the answer you have is correct

Explanation:

3 0
3 years ago
Read 2 more answers
The electron transport process makes water and ATP and is sometimes called ________ because it requires oxygen. oxidation dephos
tatyana61 [14]
<span>The electron transport process makes water and ATP and is sometimes called Oxidative phosphorylation because it requires oxygen.</span>
4 0
3 years ago
Read 2 more answers
How do humans affect vegetation
Sunny_sXe [5.5K]

Answer:

  • by human made fire like throwing after using ciggatettes
  • by deforestation cutting trees for making home,fuel etcetra
5 0
4 years ago
Read 2 more answers
The rate constant for the decomposition of n2o is 2.30 s−1. What is the half-life of the decomposition?
Alchen [17]

Answer:

0.3 s.

Explanation:

Half-life of a first order reaction is defined as the the time taken for any fraction of the reaction to complete is independent of the initial concentration.

Half-life of a first order reaction, t° = 0.693/k

where,

t° = half-life of the reaction

k = rate constant

= 2.3 s^-1

Therefore,

t° = 0.693/2.3

= 0.30 s.

3 0
3 years ago
Other questions:
  • What is the different types of technology used for cloning animals?
    9·1 answer
  • How many nitrogen atoms are in 2.79 mo.of NH3
    12·1 answer
  • Im confused! Can someone please show me the step by step process??
    7·1 answer
  • Ca(OH)2 + H2SO4 ⟶2H2O + CaSO4 What volume of 1.45 M Ca(OH)2 is needed to react with 25.0 moles of H2SO4?
    12·1 answer
  • Calcium chloride contains only calcium and chloride. What is the formula for this compound?
    13·2 answers
  • What is the number of electrons in silicon-30
    9·2 answers
  • Describe the process to electroplating with the help of an activity <br>​
    12·1 answer
  • 25 POINTS FOR SCIENCE! PLEASE HELP!! THANK YOU!!!!
    13·1 answer
  • Under Organic compound
    5·1 answer
  • How much heat does it take to turn water from -30 degreesC to 120 degreesC?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!