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
Anestetic [448]
3 years ago
13

Why is helium in group 18 on the periodic table though it only has 2 valence electrons?

Chemistry
1 answer:
damaskus [11]3 years ago
8 0
<span> strictly speaking, a molecule has at least two atoms. ... Atoms with full valence electron shells are stable. Full Text[ edit ] The noble gases are a group of chemical elements that make up Group 18 on the periodic table.</span>
You might be interested in
What is the NGOs location in Nigeria​
Anon25 [30]
Old Peoples Support International
6 0
2 years ago
What reacts in a chemical reaction to form a new substance with different products
lorasvet [3.4K]

Answer:

Atoms

Explanation:

5 0
3 years ago
Read 2 more answers
How many grams of hydrogen gas would be needed to form 8.0 grams of water? H2+O2=H2O
damaskus [11]
8 H2= 0.90 g , hope that helps
you with your work 

7 0
3 years ago
Write a balanced chemical equation, including physical state symbols, for the decomposition of solid calcium carbonate (CaCO_3)
nadya68 [22]

Answer:

CaCO₃(s) → CaO(s) + CO₂(g)

Explanation:

The decomposition reaction always make two compounds from one.

The products always have simpler chemical structure, originated from a determined compound. This can happens  spontaneously or by a third party.

A notable example of decomposition is hydrolysis. As for example the case of water, which decomposes and generates oxygen and hydrogen gas

2H₂O (l) → 2 H₂ (g) + O₂ (g)

In this case, the calium carbonate decomposes into CaO and CO₂

These two, are the products of the decomposition.

Of course, the unique reactant is the Calcium Carbonate

The balanced equation is:

CaCO₃(s) → CaO(s) + CO₂(g)

6 0
3 years ago
Read 2 more answers
A lithium atom starts from rest at a position x = xo and falls toward zinc atom with an acceleration that depends on their separ
rusak2 [61]

Answer:

Please refer to the attachment for answers.

Explanation:

Please refer to the attachment for explanation

3 0
3 years ago
Other questions:
  • See the picture to answer the question
    9·1 answer
  • For multiple covalent bonds to form in molecules the molecules must contain carbon nitrogen or​
    15·1 answer
  • Which law states that the volume and absolute temperature of a fixed quantity of gas are directly proportional under constant pr
    6·1 answer
  • When the free-energy change (AG) of a reaction is negative, the reaction is said to be: Endergonic Non spontaneous Spontaneous E
    10·1 answer
  • Fill in the blank.<br> 5.22x10^-3 = [? ]x 10^-2
    6·1 answer
  • Which of the following is not organic?
    9·1 answer
  • How would one make a 2 M solution of a compound?
    11·2 answers
  • PLEASE HELP FOR 15 BRAINY POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    11·1 answer
  • How can you tell the difference between two clear liquids
    10·1 answer
  • A buffer is prepared by adding 150mL of 0.50 M NH3 to 250mL of 0.50 M NH4NO3. What is the pH of the final solution? (Kb for NH3
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!