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
Elena-2011 [213]
2 years ago
10

¿Qué son los lantánidos y actínidos?

Chemistry
1 answer:
harkovskaia [24]2 years ago
6 0

Answer: En estos grupos de los elementos de transición se encuentran las llamadas tierras raras, separadas del resto de elementos de la tabla, que pertenecen al grupo IIIB y se les conoce como lantánidos y actínidos.

You might be interested in
A 10.50 gram sample of a compound is decomposed to yield 3.40 g Na, 2.37 g S, and 4.73 g O. What is the mass percentage of each
9966 [12]

Answer:

Na = 32.4% , % S = 22.6% and %O = 45.0%

Explanation:

% Na = 3.4/10.5. × 100%

= 32.4%

%S = 2.37/10.5 × 100%

= 22.6%

% O= 4.73/10.5 × 100%

= 45.0%xplanation:

6 0
2 years ago
Which of these elements is the most reactive
mr_godi [17]

Answer:

What elements?

Explanation:

The alkali metals are softer than most other metals. Cesium and francium are the most reactive elements in this group. Alkali metals can explode if they are exposed to water.

Not sure if this what you were talking about but here

This from google btw not gonna lie

7 0
3 years ago
Which of the following is the best example of how Earth's geosphere interacts with the biosphere?
olga55 [171]

Answer:fffffhhhgffv

Explanation:

6 0
3 years ago
Question 7 (2 points)<br> A mocktail is a flavoured cocktail.<br> O True<br> O False
RoseWind [281]
False a mock tail is a cocktail with the liquor.
5 0
2 years ago
Read 2 more answers
What is the mass of 3.20x10^23 formula units of iron (III) oxide (Fe2O3)?
yaroslaw [1]

The mass of iron (III) oxide (Fe2O3) : 85.12 g

<h3>Further explanation</h3>

Given

3.20x10²³ formula units

Required

The mass

Solution

1 mole = 6.02.10²³ particles  

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

mol of Fe₂O₃ :

\tt n=\dfrac{3.2.10^{23}}{6.02.10^{23}}=0.532

mass of Fe₂O₃ (MW=160 g/mol)

\tt mass=mol\times MW=0.532\times 160=85.12~g

4 0
2 years ago
Other questions:
  • What problem does the hudson river still face
    11·2 answers
  • Whether or not the process is observed in nature, which of the following could account for the transformation of gallium-67 to z
    7·1 answer
  • Why are the alkali metals and the halogens among the most reactive elements on the periodic table
    13·2 answers
  • R is the midpoint of FG.<br><br> FR = 26 find RG
    15·1 answer
  • Sulfur has 4 isotopes listed below. Using a periodic table, which isotope is most likely to be the most common isotope? A) sulfu
    10·1 answer
  • Which of the following correctly describes the importance of the carbon cycle? to recycle oxygen-based compounds to replenish ni
    7·2 answers
  • Key deer are found on the islands of the Florida Keys and feed on the native trees. Which is most likely to happen to population
    13·1 answer
  • Balance the equation for <br> __Ca+__Pb(NO3)2—__Pb+__Ca(NO3)2
    13·1 answer
  • PLEASE HELP
    15·1 answer
  • A teacher divides her class into four groups. She assigns
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!