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
allsm [11]
3 years ago
10

When was helium discoved?

Chemistry
1 answer:
andrey2020 [161]3 years ago
4 0
It was discovered in 1868.i hope this helps you .
You might be interested in
Which of these is not a covalent molecule?<br> 1. F2<br> 2. CO<br> 3. LiF<br> 4. NH3
beks73 [17]

LiF or lithium fluoride is the non covalent molecule or ionic compound.

Option 3.

<h3><u>Explanation:</u></h3>

Covalent molecules are those molecules which do have actual bonds between the atoms present in the molecule by sharing of the electrons. But in ionic molecules, there's no actual bonds between the atoms, but the oppositely charged ions are attracted towards each other by means of electrostatic force of attraction.

The molecules that are formed by the atoms with high electronegativity and electropositivity are actually ionic because the atoms with high electronegativity are able to actually gain electron readily and the atoms with high electropositivity are actually ready to give the electrons to the electronegative elements.

Lithium is highly electropositive and fluoride is highly electronegative. So they establish an ionic bond. But other molecules like fluorine molecule has both the electronegative elements, Carbon monoxide has carbon which isn't electropositive highly, and ammonia has hydrogen which isn't electropositive.

So lithium fluoride is the ionic compound.

4 0
3 years ago
According to the kinetic molecular theory, the particles of an ideal gas
Vera_Pavlovna [14]
A have no potential energy
7 0
3 years ago
Please help me with dis
topjm [15]

Answer:

c

Explanation:

4 0
3 years ago
Which criteria are responsible for deciding whether a heterogeneous mixture is a colloid or a suspension?
gayaneshka [121]
I believe the criteria responsible for deciding whether a heterogeneous mixture is a colloid or a suspension is whether the <span>particles remain suspended for an extended period of time. I hope it helps you.</span>
8 0
3 years ago
Read 2 more answers
Which of the following is true of a gas?
mote1985 [20]

Answer:

d

Explanation:

6 0
3 years ago
Other questions:
  • What is the correct interpretation of the mole ratios for the elements in
    6·2 answers
  • Explain how an automobile air bag protects the people in the car from being hurt as a result of impact
    14·1 answer
  • A moving train comes to a stop at the station. What happened to
    15·1 answer
  • Why are the marked lines on a beaker like this useful for measuring the volume of a liquid? A liquid maintains its shape in the
    15·2 answers
  • Justin B. Believes that the temperature lowering during the fall months is what causes the color of the leaves to change. He set
    9·1 answer
  • Based on the oxidation states of the atoms in this reaction, answer the questions. 4Fe(0) + 3O2(0) → 2Fe2(3+)O3(2-) How many ele
    10·1 answer
  • g If attempting to dissolve both silver bromide and silver chloride in aqueous solution through complex ion formation, which dat
    13·1 answer
  • When a 18.0 mL sample of a 0.308 M aqueous hydrofluoric acid solution is titrated with a 0.361 M aqueous sodium hydroxide soluti
    7·1 answer
  • En el enlace covalente entre azufre y carbono (6 y 4 electrones en su ultima capa respectivamente) la molécula tendrá ?
    11·1 answer
  • A white powder is made of 24% carbon and the rest being Fluorine. Its simplest formula is. (C=12, F=19)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!