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
zhenek [66]
3 years ago
11

What do helium (He), neon (Ne), and argon (Ar) have in common?

Chemistry
2 answers:
IrinaK [193]3 years ago
6 0

Answer:

The answer is: D

Explanation:

A. They have the same number of electron energy shells.  Is false, all the elements are in different periods so, they have different number of lectron energy shells.

B. They are all Halogens.  No, is wrong, halogens are F, Cl ,Br

C. They have the same number of electrons.  is wrong, if they had the same number of electrons they must be they same element and they aren't the same.

D. They are all Noble gases. Yes, it's true they are noble gases, they are the first group in the periodic table from the right.

defon3 years ago
3 0

Answer:

D-They are all noble gases

Explanation:

They have the same valency

You might be interested in
he narrator says that the story of the universe is the story of the transformation of energy from one form to another. What do y
USPshnik [31]

Answer:

the narrator means that before the universe was out forward to completion,

there were little things that came together to form other things

a typical example can be found in the big bang theory

6 0
2 years ago
If the ribosomes of a cell were destroyed what effect would this most likely have on the cell
Serjik [45]
Cells will not able to produce proteins by translation as it's happens in ribosomes
8 0
3 years ago
How many moles of ammonium sulfate can be from the reaction of 30.0 mol of NH3 with H2SO4 according to the following equation: 2
marysya [2.9K]

Answer:

15 moles of  ammonium sulfate would be formed from 30 moles of ammonia.

Explanation:

Given data:

Number of moles of ammonium sulfate formed = ?

Number of moles of ammonia = 30.0 mol

Solution:

Chemical equation:

2NH₃  +   H₂SO₄  →  (NH₄)₂SO₄

Now we will compare the moles of ammonium sulfate with ammonia.

                           NH₃           :           (NH₄)₂SO₄

                             2              :               1

                            30.0          :              1/2×30.0 = 15.0 mol

So 15 moles of  ammonium sulfate would be formed from 30 moles of ammonia.

7 0
3 years ago
How does density differ from concentration?
Aliun [14]
The main difference between concentration and density is that concentration refers to how much of a substance is present in a mixture, whereas density refers to the mass of a substance per unit volume.
4 0
3 years ago
Why does increasing the temperature of two reactants in solution make a
gogolik [260]
The two molecules will only react if they have enough energy. By heating the mixture, you are raising the energy levels of the molecules involved in the reaction. Increasing temperature also means the molecules are moving around faster and will therefore "bump" into each other more often.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following solids is the best insulator?
    6·2 answers
  • Franklin was performing an experiment by combining hydrochloric acid and sodium hydroxide. He measured the mass of his reactant
    14·2 answers
  • 5. How many moles are in 58.6 L of Nitrogen gas (N.) at STP?
    7·1 answer
  • HELP ASAP AND ILL GIVE U BRAINLIEST
    13·1 answer
  • (b) How many moles of hydrogen are needed to make 30 moles of Fe?<br><br> PLEASE HELP ASAP
    11·1 answer
  • Rank the following iron-carbon alloys and associated microstructures from the hardest to the softest: __________.
    8·1 answer
  • Which might cause someone to be exempt from soccer practice? *
    5·1 answer
  • What set of coefficients will balance the chemical equation: _NaBr (aq) + _H3PO4 (aq) → _Na3PO4(aq) + _HBr (aq)
    11·1 answer
  • What is the pH of a solution that has a hydrogen ion concentration of 6.9*10^-4?
    7·1 answer
  • Which event is an example of an endothermic reaction?.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!