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
Brums [2.3K]
3 years ago
9

What is the period number in which helium is found

Chemistry
2 answers:
julsineya [31]3 years ago
6 0

Answer:

Helium is the second element on the periodic table. It is located in period 1 and group 18 or 8A on the righthand side of the table. This group contains the noble gases, which are the most chemically inert elements on the periodic table. Each He atom has two protons and usually two neutrons and two electrons.

Explanation:

thoughtco.com

GaryK [48]3 years ago
5 0

Answer:

period 1 and group 18 or 8A on the righthand side of the table.

Explanation:

You might be interested in
Which of the following best describes the particles in an atom?
yanalaym [24]

Answer:

Electrons move around a nucleus.

Explanation:

6 0
2 years ago
Which element has the strongest attraction for electrons?
NemiM [27]

Answer:

The answer is Flourine

3 0
3 years ago
Write a chemical equation for the reaction that occurs in the following cell: Cu|Cu2+(aq)||Ag+(aq)|Ag Express your answer as a b
Alinara [238K]

Answer:

Explanation:

The cell reaction properly written is shown below:

              Cu|Cu²⁺_{aq} || Ag⁺_{aq} | Ag

From this cell reaction, to get the net ionic equation, we have to split the reaction into their proper oxidation and reduction halves. This way, we can know that is happening at the electrodes and derive the overall net equation.

  Oxidation half:

                  Cu_{s}  ⇄ Cu²⁺_{aq} + 2e⁻

At the anode, oxidation occurs.

  Reduction half:

                  Ag⁺_{aq} + 2e⁻ ⇄ Ag_{s}

At the cathode, reduction occurs.

To derive the overall reaction, we must balance the atoms and charges:

             Cu_{s}  ⇄ Cu²⁺_{aq} + 2e⁻

              Ag⁺_{aq} + e⁻ ⇄ Ag_{s}

  we multiply the second reaction by 2 to balance up:

         2Ag⁺_{aq} + 2e⁻ ⇄ 2Ag_{s}

The net reaction equation:

Cu_{s} + 2Ag⁺_{aq} + 2e⁻⇄ Cu²⁺_{aq} + 2e⁻ + 2Ag_{s}

We then cancel out the electrons from both sides since they appear on both the reactant and product side:

  Cu_{s} + 2Ag⁺_{aq} ⇄ Cu²⁺_{aq} + 2Ag_{s}

6 0
3 years ago
How can glass be a liquid if it's so hard?​
levacccp [35]

Answer:

It is an amorphous solid and hence also called pseudo solid. So it flows very slowly over thousands of years. It is not visible to the n*ked eye.

7 0
2 years ago
Cell is to a tissue as brick is to _______.<br> Cement<br> Clay<br> Bricklayer<br> wall
svet-max [94.6K]

Answer:

bricklayer

Explanation:

is the correct answer

6 0
3 years ago
Other questions:
  • Allicin (C6H10OS2) contains 59.9 g of carbon, 21.7 g of hydrogen, 24.4 g of oxygen, and sulfur. What is the mass percent of sulf
    8·2 answers
  • 2. A gas absorbs 21.39 kJ of energy while expanding against 0.276 atm from a volume of 0.0432 L to 1.876 L. What is the energy c
    12·2 answers
  • How many double bonds are in lewis structure of oxygen difluoride, OF2? 1,0, 2, or 3​
    13·1 answer
  • A dilute aqueous solution of an organic compound soluble in water is formed by dissolving 2.35 g of the compound in water to for
    6·1 answer
  • Net Ionic equations
    13·1 answer
  • A substance that forms a vapor is generally in what physical state at room temperature? A gas b liquid c liquid or solid d solid
    8·1 answer
  • Scoring Scheme: 3-3-2-1 Use one of your experimentally determined values of k, the activation energy you determined, and the Arr
    12·1 answer
  • When light hits the Earth at a greater angle, what does this cause?​
    13·1 answer
  • I need help with both parts, ill give brainliest and 30 points
    15·2 answers
  • To study a key fuel-cell reaction, a chemical engineer has 20.0-L tanks of H₂ and of O₂ and wants to use up both tanks to form 2
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!