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
PolarNik [594]
2 years ago
7

The layer of Earth that has the lightest elements?

Chemistry
1 answer:
julsineya [31]2 years ago
6 0
<span>The layer of Earth that has the lightest elements is the crust</span>
You might be interested in
What happens when liquid magma is cooled
Vaselesa [24]
Magma that cools quickly forms one kind of igneous rock, and magma that cools slowly forms another kind. When magma rise from deep within the earth and explodes out of a volcano, it is called lava, and it cools quickly on the surface. Rock formed in this way is called extrusive igneous rock.
6 0
3 years ago
Which of the following is an irreversible physical change?
Yuliya22 [10]

Answer:

b) sharpening a pencil

Explanation:

If you melt lead, boil water, or dissolve sugar in water, you can return all of them back to their original state. If you sharpen a pencil, you can't reattach the shavings as they were originally.

3 0
3 years ago
A metal ion Mⁿ⁺ has a single electron. The highest energy line in its emission spectrum occurs at a frequency of 2.961 x 10¹⁶ Hz
Whitepunk [10]

Answer:

z≅3

Atomic number is 3, So ion is Lithium ion (Li^+)

Explanation:

First of all

v=f*λ

In our case v=c

c=f*λ

λ=c/f

where:

c is the speed of light

f is the frequency

\lambda=\frac{3*10^8}{2.961*10^{16}}\\ \lambda=1.01317*10^{-8} m

Using Rydberg's Formula:

\frac{1}{\lambda}=R*z^2*(\frac{1}{n_1^2}-\frac{1}{n_2^2})

Where:

R is Rydberg constant=1.097*10^7

z is atomic Number

For highest Energy:

n_1=1

n_2=∞

\frac{1}{1.01317*10^{-8}}=1.097*10^{7}*z^2*(\frac{1}{1^2}-\frac{1}{\inf})\\z^2=8.99\\z=2.99

z≅3

Atomic number is 3, So ion is Lithium ion (Li^+)

3 0
3 years ago
Porque a las vacunas los cientificos las llaman reactivos.​
yan [13]

Answer:

Because scientists call vaccines reagents.

5 0
2 years ago
For many purposes we can treat propane as an ideal gas at temperatures above its boiling point of . Suppose the temperature of a
irina [24]

Answer:

See explaination

Explanation:

please kindly see attachment for the step by step solution of the given problem

4 0
3 years ago
Other questions:
  • In general, in which direction does wind blow?
    11·2 answers
  • Which of these time measurements is the smallest?
    10·2 answers
  • A lahar is a type of mudflow that occurs
    8·1 answer
  • Why do rivers have deltas?
    5·1 answer
  • in your notebook,write the appropriate tempo for the following actions.Then demostrate the actions then,demostrate the action in
    5·1 answer
  • Place the
    14·1 answer
  • Which type of bond involves valence electrons constantly moving between atoms, like a sea of electrons?
    5·1 answer
  • I don’t wanna fail if you know the answer pls help me :(
    9·2 answers
  • Which statement is best supported by this scale? (LT 2)
    15·2 answers
  • Tryptophan is one of the amino acids found in proteins:
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!