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
IRINA_888 [86]
3 years ago
10

What controls the electrical properties of the atom? the valence electron is referred to as a __________ ? when silicon atoms co

mbine to form a solid, they arrange themselves into an orderly pattern called ____________ ?
Chemistry
1 answer:
Drupady [299]3 years ago
7 0
<span>It is the valence orbit that controls the electrical properties of the atom. The valence electron is referred to as a "free electron.' Valence electrons have the highest energy of all electrons in an atom; they are also the most reactive, meaning they are usually the electrons involved in bonding. When silicon atoms combine to form a solid, they arrange themselves into an orderly pattern called a crystal.</span>
You might be interested in
Calculate the molar mass of Cr4(P2O7)
Norma-Jean [14]

Hey there!

Cr₄(P₂O₇)₃

Cr: 4 x 51.996 = 207.984

P: 6 x 30.97 = 185.82

O: 21 x 16 = 336

-------------------------------------

                      729.804 g/mol

The molar mass of Cr₄(P₂O₇)₃ is 729.804 g/mol.

Hope this helps!

7 0
3 years ago
Luke and Sian want to plant a vegetable garden in their yard. A soil testing kit measures the soil pH at 5.0, but the lettuce th
dexar [7]

Answer:

So, Luke and Sian has to increase the pH of the soil by adding base to it.

Explanation:

The pH is defined as the negative logarithm of the hydrogen ion concentration in their aqueous solution.

pH=-\log[H^+]

  • With increase in hydrogen ion concentration the pH value decreases.
  • With decrease in hydrogen ion concentration the pH value increases.

The pH of the soil after testing it on a kit comes out be 5.0, but they both need pH of the soil to 6.5.

Comparison of pH of soil:

  =  5.0 < 6.5

= High hydrogen ion concentration > High hydrogen ion concentration

So, Luke and Sian has to increase the pH of the soil by adding base .Doing so will decrease the hydrogen ion concentration in the soil (where as addition of acid lower the pH of soil).

4 0
3 years ago
These substances are all ____. H2O2 Li NaCl O2
Bogdan [553]

Answer: pure substances.


Explanation:


The given substances are:

  • H₂O₂
  • Li
  • NaCl
  • O₂

All what surrounds us, which has mass and occupies spaces, is matter. There are two kind of matter: pure substances and mixtures.


Pure substances have a uniform and constant composition. On the other hand, mixtures are combinations of two or more pure substances in  any arbitratry ratio.


Pure substances may be elements or compounds. The elements are the substances conmposed by one only kind of atom. In the list of substances given, Li and O₂ are elements: all the atoms in Li are lithium, and all the atoms in O₂ are oxygen atoms.


Compounds are the chemical combination of two or more different kind of atoms. In the given list H₂O₂ and NaCl are compounds. As you see, H₂O₂ contains atoms of hydrogen and oxygen, chemically bonded, in a fixed ratio (2 atoms of hydrogen by 2 atoms of oxygen). And NaCl has atoms of Na (sodium) and Cl (chlorine), chemicaly bonded, in a fixed ratio (1:1).


There are only 118 known elements and you can find them in any modern periodic table. Therer are virtually infinitely many compounds since many different combinations of the elements can be attained.


Elements and compounds have in common that they are classified as pure substances.


7 0
3 years ago
Below are shown, for five metals, reduction reactions and standard electrode potential values. which of these metals is the leas
just olya [345]
Above question is incomplete. Complete question is attached below
........................................................................................................................
Solution:
Reduction potential of metal ions are provided below. Higher the value to reduction potential, greater is the tendency of metal to remain in reduced state.

In present case, reduction potential of Au is maximum, hence it is least prone to undergo oxidation. Hence, it is least reactive.

On other hand, reduction potential of Na is minimum, hence it is most prone to undergo oxidation. Hence, it is most reactive. 


7 0
3 years ago
Which equation using element symbols correctly describes the reaction: "One molecule of methane plus two molecules of diatomic o
MrMuchimi

Answer:

CH4+2O2→2H2O+CO2

8 0
3 years ago
Read 2 more answers
Other questions:
  • _______________ reactions transfer energy to the surroundings, usually as heat. A) Decomposition B) Endothermic C) Exothermic D)
    11·2 answers
  • Which characteristic of life is demonstrated when eagles use sharp talons to grab fish from the water?
    7·2 answers
  • What is the full form of DNA​
    8·2 answers
  • What type of atoms typically loses an electron?
    12·1 answer
  • White vinegar is available as a 5% acetic acid solution and a 10% solution, by volume. How many millilitres of each solution mus
    15·1 answer
  • A litter of pigs is born. Three are female, and three are male. Which set of symbols correctly describes the gender of each pigl
    12·2 answers
  • How much energy must be added to a 2-kg piece of wood with a specific heat
    6·1 answer
  • What are radioactive isotopes?
    7·1 answer
  • Please help me. It's urgent .
    8·2 answers
  • How does a covalent bond form?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!