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
Lorico [155]
3 years ago
5

Chromium has a smaller atomic radius than iron. * O True False

Chemistry
1 answer:
Sunny_sXe [5.5K]3 years ago
3 0

Answer:

False

Explanation:

Atomic radius is defined as the distance between the nuclei of 2 identical atoms that are bonded together

Now, from periodic tables, chromium has a calculated atomic radius of 1.66 Å while iron has a calculated atomic radius of 1.56 Å

Thus, chromium has a bigger atomic radius than iron.

So the statement is false.

You might be interested in
Help with this chemistry problem
xz_007 [3.2K]
  N2  +   3H2  ---->    2NH3

! mole of nitrogen reacts with 3 moles of hydrogen to give 2 moles of ammonia.

So by proportion  number of moles NH3 obtained from 0.60 moles of N2 =

  0.6 *2  = 1.2 moles Answer
6 0
4 years ago
Which statement is TRUE about oxidation-reduction reactions? a. Every oxidation must be accompanied by a reduction. b. There are
Tomtit [17]

Answer:

Every oxidation must be accompanied by a reduction.

Explanation:

Oxidation and reduction are complementary processes. There can be no oxidation without reduction and vice versa. It is actually a given an take affair. A specie looses electrons which must be gained by another specie to complete the process. This explains why the selected option is the correct one.

8 0
3 years ago
In the three-dimensional structure of methane, CH4, the hydrogen atoms attached to a carbon Group of answer choices at the corne
alexandr402 [8]

Answer : The correct option is, at the corners of a tetrahedron.

Explanation :

Formula used  :

\text{Number of electron pair}=\frac{1}{2}[V+N-C+A]

where,

V = number of valence electrons present in central atom

N = number of monovalent atoms bonded to central atom

C = charge of cation

A = charge of anion

Now we have to determine the hybridization of the given molecule.

The given molecule is, CH_4

\text{Number of electrons}=\frac{1}{2}\times [4+4]=4

The number of electron pair are 4 that means the hybridization will be sp^3 and the electronic geometry of the molecule will be tetrahedral and the bond angle will be, 109.5^o.

Hence, the correct option is, at the corners of a tetrahedron.

4 0
4 years ago
Some scientists have called thawing permafrost a time bomb cite to piece evidence why
Amiraneli [1.4K]
On the rolling landscape of shrubs and moss around Hudson Bay, they probe the once impenetrable ground now thawing in places due to global warming.

<span>Read more at: </span><span>https://phys.org/news/2015-11-permafrost-climate.html#jCp</span>
4 0
3 years ago
Ionic equation shows all soluble ionic substances dissociated into ions both teh atoms and the electrical must be balanced in th
12345 [234]
<span>Only dissociated substances are written as ions in equations. Dissociated substances must balance numerically, and electrically. The process in which ions leave a solution and regenerate an ionic solid is precipitation. Precipitate insoluble solid formed, dissolution and precipitation are opposite processes.</span>
4 0
4 years ago
Other questions:
  • How many neutrons does element X have if its atomic number is 22 and its mass number is 99?
    11·1 answer
  • Write the ions that result from the dissociation of na2s
    6·1 answer
  • How many molecules are 24.7 grams of methane gas?
    15·1 answer
  • Choose the molecule or compound that exhibits dipole-dipole forces as its strongest intermolecular force. a) BCl3 b) N2 c) H2 d)
    12·1 answer
  • QUESTION 57
    10·2 answers
  • Find the number of atoms of lead in 30.04 moles of leads
    8·1 answer
  • The table below lists the properties of a metallic element. Shiny, Silver colored, Forms +1 and +2 ions, compound with sulfur is
    7·2 answers
  • Which is the dependent variable in an experiment? 1.what I observe. 2. what I keep the same 3.What I change in the experiment. H
    15·1 answer
  • I need help plz..
    5·2 answers
  • a chemical company has decided to store some spare iron sulfate in aluminium tanks. explain why this is a bad idea
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!